Strategies for Mentally Calculating Percentages

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[@nickkangtaylorb]

It's 2:12 am and I'm 31 years old and I'm just so happy to be finally learning math lol

[@silvervortex2441]

The Prince 30 here I wanna self learn everything I can.

[@yourcreed104]

😂 And im 17 trying to look cool

[@victoriahoffman4626]

Wholesome.

[@debapriyarouth551]

28. 4:30am here.

[@user-us4ws9px2s]

10:20 Actually I never thought of you could use commuative law for numbers there , thats awesome....

[@miguelfontenele221]

Same, I've decided to do some deep studying in mathematics and it's really cool of how many ways you have to think about a single problem, makes me think i'm stupid or something for not thinking differently :D

[@leziehr]

in case you wonder how it even works, here it is: P% of x can be written as x(P/100) you can put x on the numerator since it’s a multiplication xP/100 you can rearrange it as P(x/100) and that’s why it works

[@lollipopkaleem9918]

Those students are blessed who have him as his mathematics teacher. His teaching methodology is inspirational

[@goldenwarrior1186]

And the best part is that other ppl learn (from YT)

[@AK-uo8cm]

Wowowowow I saw Eddie Woo today and took a photo with him, and he signed my calculator!! So inspirational, hoping to be like you someday.

[@bess00]

I envy all of the students in that class for having such a down to earth teacher, I wish I was lectured like this!

[@kritrangari3288]

Me too

[@user-us4ws9px2s]

He is really good to leran math. To think intuitively in math problem solving is very important (and fun).

[@jatozzie8623]

I found my hand actually going ip when he asked a question😂😂

[@simran3382]

Yeah me too

[@arklur3193]

The 3rd tip is quite awesome, have never-ever heard about this, thanks!

[@bmcseal01]

I’m mind blown, no lie. Real down to earth explanation.

[@picturetaker607]

I loved number 3, I had to sit down and make a proof, Glad I did, I understand it now!

[@teacher.prashantdubeyforma5142]

What I like about u is u don’t just stick to the methods u play ur way around. Being a teacher myself I really appreciate that

[@irem96]

amazing teacher thank you

[@pop5sam]

Thank you Eddie, I was not aware from third method. Thank you so much,,,,,

[@vincent012295]

Amazing techniques. Very helpful when calculating shopping sales on mall 😂

[@SmilerAndSadEyes]

oh wow...my whole life i've been using tips 1 and 2, but silly me, never been using tip 3 until after this video!

[@thetjmanj560]

It helped me with my math. I am in grade 5 that's why and when my teacher tells me to simplify fraction she doesn't explain well but when Eddie explains I understood straight away! How does he do that?!😱

[@lalita2688]

One of the best math professors ever💪🏽🥳

[@amysteele2488]

Thanks Mr Woo! I've been watching your videos for quite some time now, but this is the first time I saw something I really wanted to comment on... I never before realised about commutativity of percentages. That makes the mental arithmetic so much easier! It was like a lightbulb going on in my head :) Thank you, thank you, thank you!

[@sayanghosh6996]

Can't believe such a great teacher is wasting his energy on such nice explainations for students who cant answer anything

[@wilhufftarkin8543]

That's the point though.

[@sayanghosh6996]

@Lailan he's teaching them percentages, they dont even know basic arithmetic.

[@sayanghosh6996]

@Lailan what else will i expect from him, hes a good teacher, he'll teach them things they should already know regardless. I am expecting the students to know the prerequisites before taking the class. If you're taking classes on percentages and tips on how to perform them faster then you should atleast know how multiplication works.

[@sayanghosh6996]

@Lailan ya he said in the beginning, that means they are SUPPOSED to know. That they have been taught that. But their responses clearly show half of them have no idea. I am not saying every student mind you, but the majority. If I had such a good teacher i would brush up on the previous lectures before attending the next one so that i can understand totally what he's teaching. Some of these student cant care less 😂

[@wilhufftarkin8543]

The last one blew my mind.

[@charlescochran5103]

Hello Mr. Woo, I'm not sure if you would use this or thin kit is worth teaching (please let me know) or that you even read these. I taught myself in school (20+ years ago) how to do mental percentages by this: P% of X. I break everything down into nice easy multiples of 10. Using the last example (72% of 50), I divide everything by 10. This gives me 7.2 10%'s and 5. Then I multiply 5 by 7.2 giving me 36. If for example the percentage was 18.275% of 0.014325 I can still do it, it just needs a little more though behind it. Cheers for the videos, Charles

[@andreynogueira7419]

Yeah, essentially what you are doing is dividing both numerator and denominator by 10 since 1% = (1/10)/10, but you do it twice: 72% * 50 = (72 * 50) / 100 = (7.2 * 50) / 10 = (7.2 * 5) / 1 = 7.2 * 5 Another way of doing quite the same thing is to simplify a fraction: 72% * 50 = 72 * 50% = 72 * (50 / 100) = 72 / (100 / 50) = (7.2 * 10) / (10/50 * 10)

[@charlescochran5103]

@Jonathan De La Paz Sure. I just use 10% as almost anything can be figured out/broken down that way.

[@mnmaddict37532]

Wow on the last example!

[@ellerslienmapeni6246]

Thank you for explaining

[@amirthegreatest]

Top quality video

[@zxxzstyle]

really appreciated, greetings from germany

[@kritrangari3288]

My life is a lie but eddie has once again made it a truth

[@sandeep_bega]

So help full video ... Thank you so much sir.

[@babypichu13]

The third idea's ever so cool!

[@rashidyousuf4873]

Hey mr woo,i wanted to ask if u could do a vid on discount ur videos help me a lot by the way thx

[@makevideosfunnier1596]

The last technique tho ! good job man

[@RM-fs8ub]

Me too...its evening and am in a partial food coma. Brain cog wheels in a gooey state. But its fun. Have to keep rewinding the video to understand!

[@RohanGupta_LP]

Can you please tell about that no. 131702 and why is it important?

[@shanzanaveed5452]

Sir please we also want your book the number ful world 🇵🇰. I will be really greatfull to you if your book also spread in Pakistan. I am also a mathematics student.

[@kaisuteknon49]

the third one blew my mind

[@kaveenjayamanna3076]

3rd trick is super cool

[@joka5672]

Oh my god this is mind blowing . I aways had to take 1% of the number and then multiply by the amount of % i wanted

[@nkn1110]

👍

[@sachinokafuka7156]

I use all these techniques without even knowing it😉

[@abhigudimella]

This is so easy

[@Incogtito]

First

[@harshwardhansingh284]

I'm Indian, and i knew these things by 5th grade. So did the prof, oh these kids. Nice tho

[@lelouchvibritannia1788]

Dude, nobody asked when were you taught this. If you already knew save your time and don't click on the video and certainly don't comment on it.

[@harshwardhansingh284]

@@lelouchvibritannia1788 nobody asked for your comment either.

[@lelouchvibritannia1788]

@@harshwardhansingh284 I don't know what did you achieve by boasting here. Loser

[@harshwardhansingh284]

@@lelouchvibritannia1788 calm down. Breathe 1, 2, 3,4 ...