Easy Percentage Trick you were Never Taught at School!

[@maurdie7221]

I've been teaching math and science since the late 90's and I can not believe I did not know this awesome little trick. I can assure you that this technique WILL be taught at school from now on.

[@JonJon-du9ne]

Did you get the answer correct?

[@kanizarajieevan1561]

He would have

[@squirey]

It's a neat trick, but communicative law could be explained more intuitively. For percentages it would be .01 a b = .01 b a E.g.: .01 x 48 x 50 = 48% of 50 = .01 x 50 x 48 = 50% of 48 = 24

[@xybersurfer]

it only works when the numbers divide nicely. which is hardly ever the case in the real world. so i wouldn't do it

[@daveadriffield7296]

Do you mean 90s?

[@BritishBeachcomber]

I've been using tricks like that all my adult life without even thinking about it. Mental arithmetic is mostly about looking at a difficult problem from a different angle.

[@BangPhotography]

whats 23% of 77

[@moqiiz5013]

@@BangPhotography 17.71. How I did it was 2.3 x 7.7.

[@BangPhotography]

@@moqiiz5013 whatttt, nah im sticking to the calc in my phone

[@annd8396]

Used to find 1% then just multiply out.. So 0.77 x 23 👍

[@BangPhotography]

@@annd8396 yeh i cant do 77 x 23 anyhow

[@Jack-ur4in]

Holy moly! I am super impressed with the first % trick….The more you understand the more you want to achieve ! Fab lessons !

[@Deliquescentinsight]

I had the dreaded 'math phobia' in school, I could blame all kinds of things but that was just the result it had on me, I think emotion plays a bigger role in learning than is commonly accepted. Good math teachers know how to present each stage of learning calmly and with assurance-I think this affects millions of people.

[@satchemo24]

Yup. And I'm one. I dreaded math in school. Was held back in 2nd grade because of it. I couldn't do simple equations. All through high school as well. I'm 58 now and still suck at math. But I just got a little better!

[@susanrhodes5681]

Michael, I agree and I "did well" but that doesn't mean that it didn't cause me great anxiety. You are so right about math teachers, I have the highest regard for them.

[@kmeganellis]

No kidding. In school, I was always top of the class except for math. By middle school I was in college prep except for math, where I was in the remedial class in 8th grade. After that I wasn’t required to take math. Tried a class in college, lasted one day. After first grade, where the teacher was literally brutal, I was so traumatized about math. I still have number dislexia which is perhaps purely from fear, IDK. But this little video has given me such relief! Maybe, at the age of 62 I can get past my fears and have a fully functioning left brain.

[@veronicaroach3667]

I totally agree - you get put off right from the start because none of it is obvious & seems like a mystery....so your mind just decides it wants nothing to do with math !! Having simple 'tricks' which then get explained will let you gradually accept the subject without fighting it !!!

[@janeburke147]

Me too lol 🏴󠁧󠁢󠁥󠁮󠁧󠁿

[@dadt8009]

When I was at school about 14 or 15 years old, the math teacher used to just read out equations for us to solve and see who shouts out the answers first. There was a kid who was really fast. Before I could write down the numbers, he already got the answers. The teacher never explained how those answers can be obtained so fast, maybe she just assumed this kid is some kind of genius. I was far from a genius, but I was and still am CURIOUS. I thought there must be some "tricks" or techniques. I often figured them out myself later.

[@minecat81]

I was like that genius except I had a 100ms ping so I was never able to get it.

[@ilikeoranges8784]

@@minecat81 100ms is good

[@Isai314]

I was that kid. I never studied, just memorize and solve it fast

[@Isai314]

@@ilikeoranges8784 not that much

[@marcvictor5305]

@@minecat81 I am like that genius except that I have a ping of a freaking goddamn whole second, not only in math but in everyday life

[@itwasjammerthatclickedyou2262]

I'm 68 yrs. Old. The older I get, the more I realize how much I don't know. Your teaching is a wonderful gift. I have 8 school aged grandchildre. We sit together and watch your videos. Not all together at once, these guys have so much energy. They come to me and show me what new things you've taught them. They are doing quite well thanks to you. I thank you so much! Jerry

[@julians7697]

Home schooling is worth improving.Mainstream schooling is selective and teaches you only how to learn.

[@Endxrrr]

people who don’t understand the joke that he is not 68:

[@Hyunjijnnn.n]

Then how old is he actually¿

[@Endxrrr]

@@Hyunjijnnn.n probably like 16

[@simonwiltshire7089]

I laughed when I watched this post! Fantastic. Had a ‘no way’ and an ‘of course’ moment at the same time!

[@MrSteeljazz]

Great trick, man. Where were you 40 years ago when maths was beating seven bells out of me?

[@satchemo24]

And me!

[@StoicLion]

Me, too.

[@fordman573]

Amen brother

[@reginacampbell4618]

Me too and I don’t even have balls!

[@parrisprice5892]

My dad ,god rest his soul ,taught me the easy way to figure a tip (15%) 10 x the number ,than half,add together. They use to go out alot,i was 7

[@abehambino]

I’ve never had a problem with percentages, and thought that I knew enough that I needed, but this one is totally new! Thank you so much!

[@intergalacticdegengypsy6135]

If U know percentages already, U didn't need to know this

[@HAPPYGUYFACE]

@@intergalacticdegengypsy6135 maybe he thought this method was more efficient so he is saying thank you

[@Sarah-tk1ms]

I was paying attention in school; however, the teachers didn't teach this trick or didn't know this trick. Thank you for this video.

[@katiesimmons5877]

Lot of "teachers" are actual idiots.

[@aussiesurfer805]

@@katiesimmons5877 only an idiot would say that , and i’m sure you’re not an idiot ... are you ?

[@katiesimmons5877]

@@aussiesurfer805 You sound like an idiot. Goid luck with that! 🤣🤣🤣🤣

[@trevorreznik3908]

So, if we teach our kids tricks, are they actually learning what math is? Meaning, do they understand what a percent of anything is based on this trick?

[@JohnDoe-lg8sq]

I was paying attention in school too, just not to the teacher.

[@ray42128]

I had an entry level exam for a new position (new career due to COVID). I have a Bachelors Degree but was very poor in math. I used your study guides for the addition, subtraction, multiplication, and division of fractions and WOW. Thank you!! I learned so much in less than an hour. I aced thru the math part. I cannot express how grateful I am to have found your lessons on You Tube. Keep up the excellent work!!!!

[@13thAMG]

Hope you got the job. Good luck. 🙂

[@alanhillyard1639]

What is your bachelors degree in? Modern dance?

[@pottedmeat3235]

I'm totally math illiterate and it took me three plays of this video to comprehend the lesson completely - but I do/did get it. Now hopefully I retain it, because it is really a simple way to figure out percentages. Thanks!

[@Zyxak]

55 and I'm still learning. Bravo!

[@chrisofnottingham]

I'm not generally a fan of maths tricks because mostly, even if the process is simple, you forget how it works if you don't use it regularly. But this is so obvious that it is essentially unforgettable and very helpful.

[@Hans-gb4mv]

And still, this will only work if the numbers make some sense. If you had to take 16% of 29 or 29% of 16 you'd still be stuck. Taking 75% of 60 is easy, but what if you had to take 75% from 75? While a nice trick, your mileage will vary.

[@patring620]

@@Hans-gb4mv Right. Clickbait.

[@surfinmuso37]

um...no it isn't

[@screamtoasigh9984]

Math tricks are great. The only ones I've learnt are from my family, school never taught them.

[@GordieGii]

But it is only useful for a tiny fraction of problems. Basically the right hand number has to be a multiple of 25, so 4% of problems fall into this category. And it doesn't save that much time unless the percentage is a multiple of 2, so now we are down to 2% of all problems. Not particularly useful.

[@mzlyzs9863]

I love numbers. Find myself keep coming back to this channel for the challenges☺

[@pepsicola3648]

(In Canada) I’m aged 70, didn’t attend high school but graduated from college as a mature student. Completed half of a university degree yet still have about a grade 5 level of arithmetic. I’ve recently gotten interested in improving my math skills and you’ve just made it so appealing to me. Thank you!

[@briand7731]

Good for you! I just turned 60 - never too old to learn and improve your life. I struggled with percentages since forever, but with this 'tool' I should be good to go. All the best for you.

[@sarahkrahn9252]

@Pepsi Hey, I’m (re-?)learning math, too! Nearing my 30’s, hated math in school, and also was in grade 5 of arithmetic when I got done with that. But now, I have reasons (aka hobbies) to encourage learning math... now I actually find it a little fun! Thank you so much for sharing. It’s cool knowing that there’s others like us. 😎

[@personincognito3989]

I'm in a similar situation and when I graduated we only need to 10 maths grade 10 and I barely passed it. But now that I'm older, I find one to learn these tricks, it's actually really really fun

[@kenjohnson5498]

I also am trying to educate myself starting with Algebra with about a 6th grade math level. I found some CD's called the "Math tutor" it is very easy to follow and go all the way up to advanced calculus. The price isn't terrible but it isn't great also :/ I bought them before i realized KZbin has just as much out there but they were of great help at the time none the less.

[@jmc8076]

Awesome! 👏 I like math - wrong or right and is behind most patterns in our world and cosmos ie archeological buildings incl pyramids, human body, and star systems even snow flakes.

[@MrArtVein]

I remember accidentally doing this in elementary school and being told I was wrong but I still had the right answer. It was all downhill from there

[@gins8781]

That was fun.

[@wallyprichard7451]

Its not wrong if it works everytime.

[@MrArtVein]

@frederick Hughes thanks for your service! Lots of people have similar stories. Heard about a vet in his 40s that was homeless and giving his assistance checks to the mother of his child for 10 years. Turns out the baby wasn't his and now they want him to pay it all back due to the fraud and she's off the hook. Sometimes life is the best teacher. The system is built to beat you up and swallow you whole. Knowing how it all works and using it to your advantage is the best way to go

[@peggymason7438]

@frederick Hughes Frederick it is not you who is stupid, it's that teacher with such a closed brain. Teachers can be so dumb about the things they say to students. I was always a smart kid, a good student, because I liked school. I've seen through life that the best students are not always the 'smartest'.

[@drunkenarmadillo3827]

@Frederick Hughes If a cat loves you, then you are a very special person indeed. I can't think of a smarter choice than choosing to be happy.

[@VintageGold]

I gave it a go and you were right...it was heaps easier! Great trick!

[@mollydunn7646]

I am 70yrs old in my primary school my teacher said I give up hope for you, in High school I did a commerce course and on my leaving certificate I passed book keeping, typing , English , history, geography , science etc but not math. In the last few months I have been watching tutorials because it has honestly bugged me cos I thought I was dumb with sums (pun intended) Now I wish I could go back and let those teachers know but I would have to dig them up.

[@billyandrew]

Ditto, but a couple of years younger.

[@carlottawalker6185]

@frederick Hughes You comment made me almost choke on my saliva

[@billsheehy1]

No worries Molly, most teachers are incompetent, judgemental assholes. In 8th grade I was told to learn to be a janitor because I was stupid, and this from a guidance counselor . I ended up with a Masters degree and became a pilot and a millionaire. Never let others judge you. I too am now 70 years old. We win, they are dead.

[@billsheehy1]

@frederick Hughes You rock Fred.

[@temik96]

@@billsheehy1 sweet!

[@dan4345]

Learned more in 3 minutes and 50 seconds than I did in 12 years of grade school.

[@TurdFurgeson571]

Then you did not take your education nearly seriously enough. You can lead a horse to the water, but you can't make him do his homework.

[@abhayraj4189]

@@TurdFurgeson571 He was just trying to make ajoke, You didnt have to destroy him

[@dare2417]

@@TurdFurgeson571 take a joke for once

[@kadaiitotallyreal2064]

@@TurdFurgeson571 but the thing is, this guy was trying to teach us something, while the school teachers were just killing time until payday

[@wasabe591]

Same here 😊

[@msudlow1928]

I have never done well in math, but this was an incredible help. Thank you so much.

[@MTMFan]

Why do schools not teach this?! Would have saved me a lot of frustration!

[@GentlemanQ]

Schools were made so the masses can be controlled easily, ask the bureaucrats whom first came up with the school idea so they can get rid of their children in exchange for more free time. You'll be taught alot in school but you'd still be dumb, most people don't even know how to manage their finances and end up in debts and poverty because school intentionally avoid teaching money/risk management so the majority of the students screw up when they get employed without basic knowledge of finances. That's works for bureaucrats too, they suck money out of other people's ignorance. That's simply why school sucks. And why most people screw up their future. That's where the role of parents comes in handy, if you wanna grow an intelligent individual with enough experience to tackle the hardships of school and future business the school shall start from age 0, and extend to year 5. At this time your child should be capable and you'll be proud of them for the rest of your life without caring too much about them. 5 years of solid saising in exchange for a 20-40 years of toxic relationship and screwed up life decisions.

[@tarrek]

It's a neat trick but it rarely helps you. If I asked you to calculate 18% of 36, it really doesn't help to switch it round.

[@ItsGamingFancy]

@@tarrek exactly. This is a really situational trick. I prefer to break down percentages. Like 16% is 10% + 5% + 1%. 10% is easy, 5% is half that, and 1% is easy. That's what I thought the video was going to do

[@wernerviehhauser94]

Honestly, every time I try to teach some shortcuts, there are always parents with arguments like "do not confuse the kids with too many options". Well, then.... On the other hand, it is not really that much faster than calculating 16*25 when knowing your multiplication table (which is advisable in either case). This "trick" is simply an application of the commutative law. It is nice, but not really a game changer. You could also go for (16/4)% of (25*4), which gives 4% of 100. Distribution law in application.

[@churly9717]

try 23% of 412

[@livetwice7702]

That is genius , I grew up with Maths Fear ........yes there is such a thing , please keep these coming because I am good at Maths when it is explained properly, not only that I enjoy it ......seriously as a child I use to have sweaty hands in maths class I was so frightened

[@raysmith2940]

Horrible to be frightened. I avoid any maths even now. Hate it.

[@codeninja1]

Thats gotta suck. I always hated when I had to write a story. Its not like I didn't have an imagination but I think my problem is unlike math, there was no right answer and that honestly followed me through life.

[@stellatomas2735]

Having been out of school for decades this literally was a treat because my brain froze when I 1st saw it....Ty

[@toshiyukisuzuki7610]

You are born to teach, sir! Love the use of different colors of markers. Awesome!

[@michaelmcclellan5345]

I always do percent with 10% and 1% and just multiply them by the digit in the tens place and ones place respectively and add them together. Takes me just a few seconds and can be done with odd percents like 43% of 60. 10% is 6 times 4 is 24. 1% is 0.6 times 3 is 1.8. 24 plus 1.8 is 25.8.

[@amortalbeing]

You are a genius man :) This is great! 12% of 3 = 1 * 0.3 + 2*0.03 = 0.36 41% of 7 = 4 * 0.7 + 1*0.07 = 2.87 57% of 12 = 5 * 1.2 + 7*0.12 = 6.84 you are awesome. Thanks a lot.

[@mumtazjetha9271]

Very good one.

[@Dave_D.]

Even easier, since you're multiplying any way....1% x the percent sought....43% of 60 = 1% of 60 x 43 = .6x43 = 25.8

[@DiscoFang]

Uhhh isn’t yours just the standard way all multi digit multiplication is done in the head?? ... 100, 10, 1 then added? This video is essentially pointing out the factors can be reversed for percentages. Which does not occur to many people at all.

[@stephenjohnston9314]

I find it even easier to explain as divide by 100 (move decimal twice) and then multiply by the percent. Which is basically what you're doing but with a touch of trick within a trick.

[@markpennie5454]

So why don't they teach this at school. Would have saved me so much time and brain cells

[@deadlyfremen7447]

I suppose it only really makes it easier in very specific situations when working with multiples of 10 or 25. Still useful to know though.

[@justaghoulintheworld]

@President Joe Biden. the third 10& of people know that.

[@johnclement7473]

You know, so true I wouldn't have need to do so many hours of study.

[@johnieking4102]

The most useful math video I've ever seen on KZbin

[@wurlitzer895]

I'm 68 and have just learnt a new trick!! Thank you so much!!! If only our maths teachers were as engaging in my school days!!

[@kt_easy_maths_tips]

Really

[@tonybarfridge4369]

Thanks Josh. With 60% of 75 I used your other method of 6x7.5 to get the answer

[@Clawdia11]

I "randomly" just came across this video. I wish I knew this trick 25 years ago, it would have saved me so many tears. I hated math in school. I'm grateful for it now because you're never too old to learn something new. 🙏❤

[@bettebruce2277]

This is great for adults. In school, kids are required to learn math according to whatever curriculum happens to be in style at the time. Teachers are adamant about kids showing their work in the steps they learned in class.

[@susanwright7682]

I’m looking at this to see if it would help my students

[@edgarcayce2.02]

Which is a shame. Teachers get dismayed when the kids don't find the solution by doing it _their way_ ? Shouldn't matter at all _how_ they find the answer; what matters is that they're able to come up with the correct answer.

[@lordhampton-wick7500]

In my experience the education system and teachers were, and still are a pain in the derriere. 🤬

[@krane15]

Math always game me a headache. That's for making it one less calculation easier. BTW, for years I was terrified of math, but when I finally learned as much as I did, I realized one incontrovertible truth: its not that math is hard, its just that its taught so badly. Your method to solving these percentage problems proves this once again.

[@Edennnnnn.]

I wish teachers would acknowledge that sometimes kids need to be shown different ways to do things because some people learn different ways. Some things in math have never stuck to me because of how badly it was taught.

[@svstraveldiary9622]

"you were not paying attention in school when the teacher told you!". NO, its because, the teacher never told in the first place!!!!.

[@kateyare4708]

The teacher did not know.

[@dwbiggly6907]

It is 5:00a.m. and I can’t sleep. I watched this video w/o volume as not to disturb my wife. DANG! I’m 64 years old and I learned 2 things today already. One of which is the contents of this revelation, and the other is the school system hired teachers that didn’t know this. Thank you for this, I don’t feel so dumb now😎

[@daledoesmtb7402]

Same here

[@mynameisgladiator1933]

What's 13% of 41 using this fake trick? You can go back to feeling less smart now.

[@janicetaylor8794]

I wish I'd had a maths teacher like this lovely man in high school instead of the screeching demon we had who scared me off maths forever. 😁

[@nancymoore8026]

I did! Thank you. What fun! Keep the ole gray cells moving and groovin' lol 🎶🎶🎶

[@MrFandango123]

This makes my life 32% of 25 easier.

[@suryaprakashganta]

8?

[@MrFandango123]

@@suryaprakashganta Your Jedi skills serve you well. 👍🏻

[@brandonburum8279]

I am amused that there are no units attached to the number. “My life is 8 better.” Uh... sure... 🥴

[@MrFandango123]

@@brandonburum8279 I know, but 8 better of anything is better than nothing. 😉

[@NareinM]

@@brandonburum8279 (32% of 25)% easier... There. Fixed it.

[@wh0tube]

How did we not get taught this in school, or anywhere?!! I’m flabbergasted! Thank you so much, I’ll be grateful for the rest of my life! Honestly! 🙏

[@christopherhines2718]

dude it only works easier to work out in your head if the numbers dont have decimal points after them,and the percentage is easy to define as a fraction, try this one 6.9876% of 2,000,586.657 Try the trick and if you took a maths exam and had to show how you worked it out line by line and wrote what you must multiply backwards still same answer then divide by 100 for the answer you would still fail example if you were 5 years old 10% of 100 ok you know its ten but you have to wright 10X100 underlined with 100 under in other words divide by 100, and if you were taught reversing it was somehow correct and wrote 100x10 underlined with 100 under in other words divide by 100 you just got big fatX not correct as it is not the correct working for the question you were asked

[@chrisfortune1813]

@@christopherhines2718 The thing is because order doesn't matter with multiplication, something we are taught in school it wouldn't be wrong. And to all those who are saying why were we not taught this in school you were, you just didn't realise it as you were taught it in two parts. Part 1 is that a percentage is a simple multiply and the divide by 100 problem and part 2 being that with multiplying and dividing it doesn't matter which order you do them.

[@gaurisharma1129]

@@chrisfortune1813 someone finally said it

[@jotterson1156]

People see numbers different and problems different...nice to have more than one way to get answer

[@EH23831]

Can we just take a moment to appreciate the Aussiness of this guy’s accent?! 👍🏻😁🇦🇺

[@janwhite9381]

So funny.....u r ridiculous

[@EH23831]

@@janwhite9381 Aussie Aussie Aussie! Oi oi oi!!

[@jaywalkercrew4446]

Yeah let’s not

[@andreamoore6477]

yep love a guy with an accent....well certain ones

[@kellysquirrelk]

Midwest USA Too busy focusing on what words he's saying, let alone the content. Didn't even realize it was Australian. Man, this Pandemic's been rough. SMH multiple times for everyone.

[@TheRandomVaper]

The example with 60%/75/3/4 is how I always did it in school and would get told by the teacher, that my result was correct but my calculation was wrong. How can my calculation be wrong when I arrive at the correct answer lmao

[@_ABHITIWARI]

Because they wanted you to follow the correct method Many times we arrive at right solution with wrong method because wrong method does not follows every time thats why they want you to learn conventional method first then in higher classes all get to know about various tricks but they have exceptions and from various sources

[@_ABHITIWARI]

@The Taco Kawaii 👍🏻

[@colinyoung3685]

@@_ABHITIWARI As one of the better maths teacher I had used to say to us: "It's better to know how to solve one problem ten ways, than ten problems one way."

[@_ABHITIWARI]

@@colinyoung3685 pk

[@_ABHITIWARI]

@@colinyoung3685 ha thike

[@NomoreAB]

Outstanding! Clear and simple explanation. Perhaps remote learning is the way to go.

[@textellerdude5768]

This simplifies my life

[@DiUnadulteratedTruth]

I definitely appreciate this. Where were you when I needed things to be much easier? Okay fine, we didn't have access to the internet during that time. So, when teachers ask to show your work, would this be allowed? I know it's the same answer, but I just believe a few teachers may have a problem with switching the numbers around. I like this way. I actually laughed like many people who have left comments.

[@marsrows2167]

Surprisingly there are many tricks like that to do the math. Many professor and teachers don’t know about it. Had professor in college who thought as many of them. Cool video.

[@mariavictor4324]

I’m 50 and always had math anxiety.. I worked out a math problem!! Feels great finally 😁...I’m so proud..thanks mate..I’m great in everything else but math makes me blind and deaf..

[@KB-ic9by]

I am so glad I am not the only that has math anxiety. I've been telling people for years that it is a true anxiety and no one believes me.

[@bb-gb7jv]

Lol I'm the same I'm good at everything except math

[@snazzyeee]

bruh this is a kids problem XD

[@242math]

This is a very neat trick and it is so fast and simple. Ignorance is killing us in education.

[@jameshunt2905]

Its perhaps whats behind the ignorance that kills so many.......

[@Deliquescentinsight]

Maths education in particular could do with a big review

[@GordieGii]

This trick is pretty much useless. What is 16% of 24? What is 48% of 51? It only works if the number on the right is a multiple of 25. Very few numbers are a multiple of 25.

[@Misterobozo1]

I failed math in school cause I couldn't understand. I just couldn't understand how to think. I mean In my head I got the right answers, but I could not put down in paper how I got the right number. This video has explained what I've been doing all along, without realising it myself.

[@davetaylor2088]

Awesome - thanks mate. I am helping my daughter with her maths and it has been a really long time for me since I had to do some of the more frustrating parts of maths (and I was never that good anyway). Your channel and Eddie Woo's have really saved my bacon.

[@tecmath]

Thanks mate

[@7SeventhFromAdam]

If my elementary math teachers taught me how to solve percentages this way, then I would be a math whiz today!😂😂😂 Education needs an overhaul. Seriously.

[@dkwuhn]

This "trick" only makes it easier when certain numbers are being used (25, 50, 75, 100, etc,), otherwise it's worthless. For instance, try and use this trick on: 16% of 44, or 28% of 92. Not very helpful, right?

[@JackHaveman52]

My math teacher taught us an easy way. Divide the number by 100 to find out what 1% would be and then multiply the 1% by the percentage given. It's incredibly easy and logical no matter what the numbers are.

[@aussiesurfer805]

haha .... mmmm ....ok ok - maybe ? but- me-not-sure-if-u-taking-the-p1ss-or-not ... in case you are actually being half serious, or even fully serious (that’s 50% or 100% of the value of your serious - not mine .. my serious value is different to yours because of course the value of anybodies “serious”’is relative ) well you see it’s like this ,, understanding what a % actually is i.e a number x another number/100 is (in itself or at its core ) a very simple concept.. So simple in fact that even a “potential”maths whiz would probably be able to understand the theory of % and therefore be able to apply different algebraic combinations that hold the same theory true, if they were faced with the task of having to calculate a % mentally that at first appearance seemed a little tricky to do without a calculator or at least a pen and paper ... actually to be honest i think most maths whizzes AND even potential maths whizzes(like what you seem to believe you are) wouldn’t have to be faced with an actual challenge to pull some different combos out of their “mental maths fun bag of awesome sick tricks”, they would probably just do that kind of thing for fun, ya know instead of hanging out at the mall or typing in youtube comments sections in between porn sessions at their mum’s house ....... having said that, a potential maths wizard might not come up with too many alternate algebraic combinations, after all they’re not a maths whiz yet they just have untapped potential .... but on the other hand, one can only assume that at some point in there life somebody has taught them how to calculate a % and being a potential maths whiz you could only assume that they would be at least 1 or 2 % interested (but for most potential maths whizzes i’d give a better guess of >75% interested in somebody talking about maths with them ) ... and it’s such a simple concept that even at 1% interest level, a potential maths whiz would be able to understand what a % is and how to calculate one,... this would then lead to a realisation that you don’t really have to be a whiz to know that you could use different ways to make it easier to calculate some % values mentally .... ( or as the maths whizzes would probably say “different algebraic combinations that independently are able to hold the same theory true” - or something like that anyway ) mmmm ... sure does make you think ... hey ?? makes me think you may not have been a potential whiz after all , but then again how could we possible know that, we’re not math-magicians are we ? .... haha - of course we’re not ...

[@billyandrew]

@@aussiesurfer805 That's 100% verbiage. 😂

[@aussiesurfer805]

@@billyandrew aaahhh very good . ty .... I always give 110% to 50% of 100% of things that I do ....

[@JC-zi8qc]

So, in the first example 16% of 25, I took 1% a quarter and multiplied it by 16 mentally, to get the right answer. Feeling pleased with myself, I then watched your trick. I was so impressed, it almost feels like cheating, it being so simple. Keep up the good work!

[@wafflesaurus_supreme]

Thank you for continuing production of these videos.

[@mhas9110]

I love how you teach this subject!

[@ladymanners618]

Thank you. My grandfather used to show me maths shortcuts, however he's been gone a long time. Subscribed.

[@dynamo1726]

I never knew this. Thanks

[@tecmath]

I don't know why I never made a video on it until now. Thanks for watching.

[@willhooke]

@@tecmath the thumbnail got my interest, as I feel I'm quite good with mental arithmetic Well, didn't know this trick and was; oh no this is too good Thank you ✅

[@payne_is_goodr.j.9563]

@@tecmath I find a much easier way of doing it is reducing the number you are looking for the percentage of to 1% by dividing it by 100 then multiplying that number by the percentage you are looking for for example: 48% 0f 50 becomes 50/100=0.50 then 0.50x48=24 32% of 176 becomes 176/100=1.76 then 1.76x32=56.32 but try to do 32% of 176 the way this video says to and gooooood luck his trick works for simple numbers but other numbers that aren't not so much

[@janwhite9381]

Is that really you, Elon???

[@dynamo1726]

@@janwhite9381 yh yh

[@knockshinnoch1950]

This technique should be taught in schools.

[@lesleyhawes6895]

I was a remedial maths TEACHER and I never knew this. I would have taught it if I had!

[@lesleyhawes6895]

Plus I have a tendency to hate unnecessary algebra!

[@daz1676]

@@lesleyhawes6895 yes but it isn’t useful unless the number is something easy like 25 50 75 or 33. It doesn’t help if you want to know 29% of 217 or 18% of 88.

[@bitsnclips8757]

I just graduated this year and am mad I didn't fin this channel earlier.

[@iancooper3396]

I went to school in the seventies and regarded myself as "fairly good at maths", but I have never seen this before?? Just goes to show you can never stop learning, but why so late???

[@lubberwalker]

Me too. God the teaching was bad. I learned a lot more in the university of life.

[@GordieGii]

The reason you have never seen this is because it nearly useless. It only works if the number on the right is a multiple of 25. Very few numbers are a multiple of 25. Basically the whole trick is this: % means "times 1/100 or 0.01" and 25 mean "100 quarters." It is basically useful for less than 2% of this type of math problems. It is useless for problems like "13% of 25" or "16% of 51."

[@imgettinby]

How different my life might have been if i'd have had a math teacher like you when I was young.

[@waantut]

No plan for a math lesson tonight, but this was great, thank you.

[@user-wp4ys9sn7b]

Your voice is so nice to listen to.. I've never felt so relaxed while doing math 🤣

[@jamesworley9888]

The gravity changing music from Super Mario would fit in nicely with it.

[@SingPrayPaint]

This is how my grandfather taught me. School did us no good. Now we have Common Core...& kids are more confused than ever! Anyone see the tragedy in that?

[@AnnaLVajda]

Yeah and since parents or grandparents learned a different method they can't even help kids with their homework. Did you see that movie stand and deliver the board of education thought the class cheated because they got similar answers wrong but it was because they all had the same teacher and were taught the same way.

[@swn69]

Dumber kids are easier to manipulate... and vote democrat.

[@asimpson164]

What I figured out about Common Core is We are over thinking it. What Common Core does is teach the most basic ways to do Math over and over. I think they do that so that the most kids will get something from it. My problem was most of my kid's homework was writing down math functions that I automatically skipped over in my head. It was instinctual for me to start where the work of the problem started and not to start with organizing the problem to fit the teacher's desired method. It was just too simple. I still hate Common Core but now I understand why.

[@jose.luis.ayala.]

@@swn69 GET OVER IT LOSER . . . TRUMPY BEAR LOST

[@kpthenut1]

Dumbing of population is now showing great results worldwide, nobody that i thought clever has yet taken time to calculate the risk factors of the Chinese flu yet...they’d rather be told by media what to do or think...

[@thesheperd7567]

I am 53 and I was in sheer panic as each lesson took us closer to percentages in the curriculum book. Sure enough I came to a grinding halt. My hand was constantly up, stuck. Cakes! We were taught imagining slices of cakes. I could imagine fractions of a cake but not a percentage, just a complete blank. I'm now in the happy retirement phase of my life and always using my phone to work out costs and comparisons from percentages. This is my bonus gift to retirement and could have saved my teacher a lot of trips to my desk and me ruining birthday cakes in my head. Many thanks, I've subscribed for more 🍰

[@DjNikGnashers]

This is unreal, I never knew this and I'm over 50.

[@GDPlainA]

Simple proof: knowing a% of b, it would be a/100 x b. and if the case becomes b% of a, it would be b/100 x a. comparing these two, a/100 x b and b/100 x a, their result would be ab/100. btw, this is really good yet simple trick

[@cassf2328]

What they said..

[@GDPlainA]

@@cassf2328 but its explained much clearer

[@johngreen3543]

Best reply of all of them up to 4 days ago. Kudos to the math teacher explaining "why"it works

[@somenicedutchguy638]

Perfect trick. No BS filling just proper explanation. All in all well executed!

[@lavapix]

My desktop calculator concurs. I'm glad I learned math before calculators became commonplace.

[@lavapix]

@@lazycat7409 They were.

[@danielnormand8156]

Even today I still believe kids should not use calculators in school until college or university. Too many young adults today can't do math without their calculator.

[@WorksopGimp]

@@danielnormand8156 Agree, you need to know the formulas of the math why and how

[@charlottekey8856]

Just having to do it over and over in life teaches you ways. I've done this pretty instinctively--just calculated 10%, or 1%, and multiplied. I'm usually right. I don't know why they don't teach other approaches in school because this is the one that sort of came naturally eventually.

[@JohnShoreuk]

Anyone got a personal computer that confirms jokes?

[@ashen1013]

I have another way solve this We get 44% of 150 First 44%, we can call 100 equal to 44.then 50 is half.its 22 after we can addition 44+22=66. this easy to calculate in mind

[@tecmath]

Love it.

[@quitusmaximus4664]

I am an Electrical Engineer and for some reason never looked at it that way - just always did it the normal way - Thank You!

[@tangatoto362]

Why was I never taught this at maths at school.... I could have been a rocket scientist after all !

[@milliosmiles5160]

Awesome! No shame in self-promotion, especially if you are brilliant! Thank you.

[@nickmorley1159]

I did NOT know this and I've always hated percentages! Thanks.

[@mkb5984]

I guess i'm the only person in the thread whom this did not help.

[@gardyloo3093]

Where was this video when I was trying to get through this in school?...Well, OK, the internet wasn't around yet then. But still...

[@krristina6835]

Just Fantastic! Thank you, funny that for entire life neeever seen such "trick" ))

[@marileeplus3]

I'm amazed! I will look like a genius calculating the tip after dining out! Usually I stress over this, now I feel confident in percentages. Thank you for sharing this.

[@bramsortwell8426]

Once you remember that % just means "divide by 100" it becomes easy.

[@mynameisgladiator1933]

Really? Then what's 13.2% of 289.22?

[@MikeKollin]

@@mynameisgladiator1933 It's ;alkjd;fakjdfienr

[@gm2407]

@@mynameisgladiator1933 Didn't manage it. I got the 38 but did the decimle point wrong. More practice needed but enjoyed the effort. I should have whole numbered them then worried about the decimile rather than do it with the point in place.

[@mynameisgladiator1933]

@@gm2407 You missed the point of my question which was rhetorical. The point I was making is that this "helpful" method is not helpful and only helpful in special cases. The truth is computers are good for things and people for different things. I'll let a calculator calculate calcs and I'll decide the MEANING of the calcs, and how to use them etc., like all good engineers.

[@gm2407]

@@mynameisgladiator1933 Oh I didn't miss the point I was using it as mental practice. It is also good to be able to verify your answer as it is possible to make errors in entering your data into calculators.

[@mrpanda4716]

You sound like bruce from finding nemo but alot nicer😄 Great videos man!

[@tecmath]

Thanks!

[@rebeccamlynch3916]

...now I can't unhear it geesh lolzz

[@devonbradley4372]

Thank you. This was really well-explained. I wish they'd taught us this at school.

[@janetd4862]

I taught grade school...I always taught that “of” means times. If you remember that, you can always do the math.

[@elliottpalmer1342]

I've learnt something there. Cheers mate.

[@radd696]

I consider myself a math person, and I came into this video thinking that I knew what you were going to do ... but, I must say, this is a new one for me .... thank you

[@iqraathemanuel]

anyone else was suspicious because of the date it was uploaded but then watched it and realized it worked

[@hankfink5412]

yeahhhhhh

[@jack002tuber]

That is brilliant! I'm 62 and never saw this ever.

[@Reilly1962]

You’re 62 of what? You’ve got to give us more to work with 🤪

[@peteryoung2070]

@@Reilly1962 Haha....62 of infinity lol

[@bluex6095]

62 ok...I've been seeing people your age a lot in the comments :)

[@jack002tuber]

@@bluex6095 I get that a lot.

[@bluex6095]

@@jack002tuber Ok...

[@Omario07]

I'm 186 yrs old and I have been teaching maths since the 1930's HOW DID I NOT KNOW ABT THIS!!!

[@mundanestuff]

Certainly don't remember being taught this in school, but dang, going to be handy in the future.

[@robertsherrick4081]

My dad was an engineer, a master at math( not just numbers) and he had a whole bag of tricks like this!

[@janwhite9381]

You are super lucky, you. I had no one.

[@saberpro123]

Wow. I'm aged 33 and I don' t know this until now. Thank you so much. Immediately hit that subscribed button.

[@marlenefearon1027]

As a now retired math teacher I'm so upset that I didn't know this before!! And it makes perfect sense!

[@bigguy7353]

All you have to remember is 10% of ANY number can be found by moving the decimal one place to the left, two places for 1%. This is not new info, btw. It was taught to me, in school, in 1986.

[@cyann410]

This was surprising, I never heard you can reverse %. Thank you ! I am 64, and if I had learned this 50 years ago, it would have saved me so much time and aggravation.

[@notever8932]

Division and percentages always screwed me up. Thanks for the most worthwhile 3 minutes I’ve had in years!

[@abeelvago]

Being the 11th of April, only 101 'you didn't use the method I taught you in class' teachers have come through here.

[@wordforger]

Ugh. Absolutely dread those words. If the answer is correct and they solved it in a way that would yield correct results every time, then they shouldn't be brought down for it. I can understand trying to expose kids to different ways to solve problems and trying to push them toward more efficient methods, but half the time the stuff you're teaching them is just abstract gobbledegook that won't ultimately apply to their lives. We force them to answer questions covering stem and leaf plots and strip diagrams, but when have any of us ever seen one of these things show up in our real lives?

[@samuelbroudy9420]

Must be from being down under. It leads to thinking upside down and/or backwards. What a gift to we top worlders. Thank you so much.

[@aliren6118]

This is the type of thing I would have learned 10 years ago and forgot. And in another 10 years from now I am going to see this video again and go "oooh nice trick."

[@undefeatableyt7]

Underrated Comment

[@jimcook2715]

Dad taught me how to do it in my head he had a 3rd grade education because he had to quit school during the depression The greatest generation

[@bigguy7353]

He would have been the generation previous, referred to as "The Lost Generation".

[@samuelbroudy9420]

My dad made it through 8th grade and quit for the same reason as yours. My 3rd grade teacher told me to quit asking dad for help with division. Implying the man was stupid but I knew for a fact he was the smartest man in the world, yanno? From that day forward I hated mathematics, school, and my 3rd grade teacher...hahaha

[@barrybr1]

Thanks brother. I'm 56 and I've never heard of this trick before. Will pass it on to my 15yo

[@SteveLalthantluanga]

My math teacher taught us to replace the word ‘of’ with ‘x’, ie the multiplication symbol, and the ‘%’ with a ‘100’ below the number before it. So this kind of problem was also a breeze for the entire class, i think 🤔😃

[@johnreid2851]

Yep, the author mentions commutation, but doesn't fully explain how it applies to the %

[@heliopyre]

still too hard for me cause I'm bad at multiplying decimals

[@0chief00]

@@heliopyre Before you try to calculate, make a quick estimate, then you don’t have to keep track of the decimal place. I.e. 40% of 50 is a little less than 25.

[@smallfeet4581]

@@0chief00 near enough is good enough for me , 10% of $10 is $1, 20% is $2 , 33% is $3.30 , 10% of $100 is $10 , 10% of $50 is $5 , 12% of $50 is around $56 , i think lol

[@bill-2018]

Our teacher taught us that too. Even though she was an ogre it stuck with me. In some other ways she didn't really explain stuff and I had problems transposing a formula and only fully grasped it when it was explained in some Open University courses I did years later.

[@antnam4406]

Automatically liked! I would have been an A student in maths.

[@valeriebrown3709]

Love your accent. Thanks for this. It helps me have another way to homeschool my kids on percentages.

[@LOL-tg2ji]

You've helped me so much throughout the years. Thx