Understanding division of fractions | Fractions | Pre-Algebra | Khan Academy

Using a number line, we'll explain the rule of "invert and multiply" when dividing two fractions.
Practice this lesson yourself on KhanAcademy.org right now: www.khanacademy.org/math/pre-...
Watch the next lesson: www.khanacademy.org/math/pre-...
Missed the previous lesson?
www.khanacademy.org/math/pre-...
Pre-Algebra on Khan Academy: No way, this isn't your run of the mill arithmetic. This is Pre-algebra. You're about to play with the professionals. Think of pre-algebra as a runway. You're the airplane and algebra is your sunny vacation destination. Without the runway you're not going anywhere. Seriously, the foundation for all higher mathematics is laid with many of the concepts that we will introduce to you here: negative numbers, absolute value, factors, multiples, decimals, and fractions to name a few. So buckle up and move your seat into the upright position. We're about to take off!
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
Subscribe to KhanAcademy’s Pre-Algebra channel:: / channel
Subscribe to KhanAcademy: kzbin.info_...

[@valeriaferreira6672]

I was in 4th grade when i learned this and now im in 7th and I finally understand.

[@dominicprince1830]

How time passes by

[@booty6405]

SAME LMAO

[@JYT.0120.7]

same..

[@megnbug]

nah im halfway through tenth grade rn and im still struggling 😭😭

[@SonuNigamUnofficial]

Its a full circle of life.......!!!!!!!!!!!!!

[@izharpagayon5826]

I kinda love watching Khan academy 👍👍 thank u for helping me Everytime that I don't know the process

[@Oozie_san]

I was in 4th grade when i learned it and know im in university this is one of the most important things im taking in my engineering design so if u want to be an engineer u need to understand this pretty well so good luck for anyone who is learning this

[@MaryJones-zv9ur]

This dose not help

[@MaryJones-zv9ur]

Busy I’m

[@akelasiders5655]

I used to hate u in 3rd grade because I didn't get what ur saying but now I'm in 7th and I finally get what ur saying

[@seventeencarateu4743]

Akela siders same thooougghhh ayeeeeee weee bottth in 7thh grade

[@alexiahstrickland689]

Funny me too but im in high school lol hahah your funny

[@fade3664]

I’m in 6th grade but I’m in ace math so

[@zyadkattab]

Akela siders you're now 9th grade right

[@connorshinavar2746]

@@fade3664 I literally am up at midnight trying to figure this out so I Dont fail a test and get a zero in math. I wish I was you.

[@xwarrior760]

Is equal to... is equal to... is equal to Error 404 answer.dll not found

[@kawakiuchiha1506]

ZA WARUDO

[@jotarokujo806]

@@kawakiuchiha1506 lmao

[@reesespuffs8998]

Time for me to question reality all over again just because I can't understand one simple video

[@rachelw2525]

lol my mom said i might need a tutor

[@ad4ny4]

Yea I can’t either

[@certifiedidiot0]

Brain is hurting

[@958rocket7]

I think i had a headache already

[@fredfred6977]

Brain hurts

[@paulceccato6216]

I still don't understand but overall great explaining! your other videos have been helpful much appreciated!

[@shanicebrown4040]

I really love this video. Thank you Sir

[@dominicprince1830]

Hello past person

[@lizababenko]

Thank you so much! I have a test on this today and you helped

[@purpuravitae8111]

Thank you Khan Academy! 😊

[@wemble6117]

Yep! I’m in 5th grade preparing for 6th because my teacher is acting like I’m not in the class (I’m full virtual) so my mom wanted me to watch these, I think 6th grade is gonna be a breeze, I learned this in 3rd grade!

[@wtvkemo]

@@wemble6117 I’m in 6th grade now

[@MrDabbio92]

His obsession with different colors for each number is really getting to me. Takes so much more time and patience, for zero return...

[@MrDabbio92]

I already feel bad for saying that, I have so much love for this man and he has helped me so much! This is the only thing that I dislike about his videos.... and thats not an awful lot to complain about..

[@radha5232]

He does this because he wants to show a way that it's easy to see the numbers. And, you DO NOT get zero in return! This guy is trying to help you sucseed in math, bro!

[@RADIOACTIVE-SNOT]

@[R] YES 😂😭💀

[@Vorg800]

me: *sees math* my brain:*brain.exe stopped working

[@seventeencarateu4743]

My teacher calls those jumps rainbows~

[@cloudymyricl9142]

I think you just saved me from failing my high-school entry test. T h a n k y o u. I could never thank you enough.

[@yonnieyarko4581]

This is such a good vid for my finals

[@izharpagayon5826]

Not only on your finals also on your homework if u have a homework/assignment

[@AviationFan1628]

@@izharpagayon5826 Exactly

[@sugnis]

I learned it 4 years ago, and I finally understand it now!!!!

[@jaquanowens12]

Help so much thank you

[@binzeroentertainment6346]

I learned this stuff years ago but I like rewatching easy videos because I like his voice 😂

[@LarkspurLight]

omg same! makes me feel very comfortable

[@nv16123]

@@LarkspurLight yay a fellow pony fan ^^ I like these videos a lot too! ^w^

[@LarkspurLight]

@@nv16123 woohoo! mlp rules!

[@nv16123]

@@LarkspurLight yay it sure does! ^w^

[@camm2020]

Great hesi test math test refresher!!!

[@ckid612]

thank you so muck you are changing lives ,sharing your math you helped me a lot when i had to do my big test of division fractions. thank you so much:)

[@legend8037]

I learned this like 5 years ago got a question with this forgot how to do it and was shocked it worked you saved me from failing algebra 2

[@makingmoves101]

I don't get it how dus dis dude actually make a living off doing fractions

[@shettr]

Maybe the billions of views they get

[@wemble6117]

@Kaislyn Snyder they have an app too

[@makingmoves101]

@Kaislyn Snyder Stfu I said that 7 months ago xd

[@makingmoves101]

@Kaislyn Snyder mans getting mad just saying Htf he do his job and pay rent

[@VickiBee]

It works for me. In fact the doctor who treats me for the accident that caused damage to the left side of my brain said it works because of imagery, which comes from a different part of the brain being connected back to the part that was hurt. He still doesn't know how exactly it's working but it is. Without the imagery I would never remember the numbers.

[@robloxmastergamer6077]

Thank you so much!! Now I finally know exactly why it works

[@sanghmitra2484]

I really like it and just highly recommend and practically appreciate it❤️ ...Thank u sir❤️✨

[@MrMarkgyuro]

great. i have never really knowed what is going on behind the scenes :) !!

[@omgawesomeomg]

why do people dislike this? is free education not enough for you?

[@orlando64000]

Because they aren't successful in life

[@sultanaltuwaim9743]

omgawesomeomg to

[@surayyahmuhammad1767]

omgawesomeomg probably because they didn't understand his explanation

[@Sameer-Mustafah-Raza1-2-1]

There are various reasons such as: Mathematical jargon terminology; reasons behind a particular formula; speed of working out etc. So please be very understanding as Maths is NOT an easy thing to grasp!

[@gipsydangergaming7366]

omgawesomeomg maybe this is easier to under stand than at school

[@n43vis]

HELPED me :)

[@loopTSB]

Try the KFC Method 1. Keep the first fraction 2. Flip the second fraction 3. Change the operation to multiplication. THIS THING MADE ME HUNGRY

[@user-hy1rk5ux6z]

Yep!!

[@imanmohammad8745]

It’s actually KCF 1. Keep the first fraction. 2. Change the operation to multiplication 3. Flip the second fraction No hate tho. 😊

[@noobfare2444]

I thought it meant, Kentucky Fried Chicken 🍗

[@danielafere6980]

KCF but it’s all good

[@rubyjeffers4065]

Iman Mohammad yup

[@radha5232]

Thank you so much, this really helped me on this topic of fractions. #LuvKhanAcademy

[@evergreenbee]

Thanks Mr Khan this helps a lot.

[@felixxu3101]

Don’t really understand. Can u explain in more detail? Thx

[@Some_randomcreature]

I was in zoom for almost an hour and didn’t get it I finally get it now and this video is only 5 mins

[@nv16123]

That HP tune-up notification at 3:30 steals the show this video 😁

[@paulinedunn6617]

This is great thanks!!

[@hannablazer5056]

Am learning this in 5th grade am about to go in six grade thank you🎉🎉🎉🎉🎉😊😊😊😊

[@bestill365]

Thanks for the refresher!

[@stefanopierantozzi4076]

thanks it is was very helpful

[@Mrmobile24]

Khan helps so much thanks!

[@celestialsomebody8076]

Great teacher!

[@billybgaming]

Better then anything I have seen

[@0zed777]

Hey I love you teaching I would rather have you as my teacher then an youtube that teaches

[@archiveevidenceexoticweapo6733]

How would you plot 8/3 divided by 7/8 on your number line?

[@izharpagayon5826]

8 _ 3 I tried

[@Strongclaw]

You might need to add more numbers 7 over 8 so mark every 10th until you have 7, 8ths

[@Strongclaw]

10 20 30 40 50 60 70 80 90 100 (1) and do that

[@LarkspurLight]

@@izharpagayon5826 8 -- 3 me too

[@dominicprince1830]

Hello past human being

[@phopthronchaiwattanachai8524]

These color make it easier to see and understand

[@bhanusingh8828]

Sir how did you add this hand tool in recording lecture. I shall be very thank full if you help me out to get this

[@RecruitScarab]

Just saved all my grades :)

[@Ryan-gh4iz]

I've been going through the Arithmetic course on Khan Academy but I've hit a wall here even with the explanation. I don't know why I can't grasp this, it sounds simple but my brain just won't make sense of it.

[@ayaan5834]

I like the way he teaches

[@misumkhan]

I'm doing this during a six hour study session though I'm in fifth grade

[@chrisoutdoors4173]

Thanks really helpful keep up the great work

[@sarahretzbetham342]

Best teacher ever👍👍👍

[@paulsha9582]

Wouldn't it be less confusing if you just said " how many times does 1/3 fit into 8/3" instead of saying "jumps" it fits in 8 times.

[@reesespuffs8998]

ikr

[@chill_karen_maddi1758]

what do u use to draw is my question..

[@rickkwitkoski1976]

I am tutoring a boy in grade 8 who understands the mechanics of multiplying and dividing fractions. However, when it comes to creating an equation from a word problem he has difficulty determining which operation to use. Many adults would as well. Take this simple one: A water tank holds 80 liters. When half of the water is used, how much water is left? (Divide by one half, right? NO!) How do I explain the difference between dividing IN half and dividing BY a half (one half)?

[@orlando64000]

show an example of both of these features

[@immoe903]

1/2 x 3 = 1/2 * 1/2 * 1/2 in short its 3 1/2s. ask him to draw multiple wholes and cut/ shade every one of them to represent half of that number.

[@beeisboring]

Your awesome thank you so much

[@LighteningBAM]

I learned this a while ago but i forgot it now but ty i have a test in a hour and i didnt study over the 3 days for even 2 mins

[@MH-lv8fs]

sooooo KNOW I get it!!!

[@unxque587]

One saying that I learned from my 6th grade math teacher when dividing fractions is "Keep, change, flip"

[@tommymichaelfrancese]

Thank you

[@Pixiesfairiedust]

Bruh about to take my geometry exams and I just know the little stuff like this is going to get me

[@siyadubey4078]

You teach me better than my teacher

[@izabellakloss]

Great video, but what if the denominaters are different numbers??

[@SharronV]

You need to make the fractions equivalent. You do this by finding the Least Common Multiple (LCM).

[@evergreenbee]

Tthis makes so much sence now!

[@proftfplayer126]

This* sense*

[@talamaddibo2595]

Thank u Khan academy 🤗🤗🤗

[@vijaylaxmimahajan8318]

Thank you I had a test tomorrow

[@masonwong895]

this is a good video

[@memehub9484]

3:41 that is what i think about khan academy the jumps are hearts

[@Salamaleikum80]

I wonder WHY you can multiply by the reciprocal to get the same result?

[@gagec8322]

There supposed to be a whole besides 1/3

[@terenava5185]

He says jumps and I just think of a frog doing math for some reason

[@yasmine._666]

Same tho

[@YourLocalPal666]

Currently in 4th grade and trying to learn this for 5th grade that way I won’t have to learn

[@vasudhamagathala8661]

Awosme

[@dmajorbowls6040]

Dude!!!!!! Come on man!!!

[@m.r_r.e.d_bcw1964]

Can I join ur class

[@saraalvarez-blasquez6430]

I'm trying to learn the LCM

[@liluhgarcia]

Thankyou!!

[@DDankeschon]

:( I didn’t get it . There was too much going on :( So what I figured from this is just flip the other numbers around.

[@darthader3507]

This video explains what is happening when you divide fractions and how to do it. If you want the shortcut, use the method “keep change flip”. Keep the first fraction, Change the division to multiplication, Flip the second fraction. Now it’s a multiplication problem. Easy. Multiply the top numbers. Multiply the bottom numbers for your new fraction. Example. 2/3 divided by 4/5. Keep the 2/3. Change division to multiplication. Flip 4/5 into 5/4. Now it’s 2/3 x 5/4. Multiply top numbers: 2 x 5 = 10 Multiply bottom numbers: 3 x 4 = 12 The answer is 10/12. You can reduce the answer to 5/6 by dividing both parts of the fraction by 2.

[@nelafah_liefie_7]

@@darthader3507 you’re so helpful! i finally understand.

[@fatjuicyrat4846]

@@darthader3507 I'm sorry if this sounds dumb but do you always have to divide by 2?

[@fatjuicyrat4846]

@@darthader3507 ah nvm I see what your talking about. :)

[@bhanusingh8828]

Hello sir,i am recording similar lectures but i am not able to add this cursor. Can you please help me to add cursor like you in sketchbook.

[@abcdef-zv8de]

Yes, that is right, but the risult is not 4 units. So if we add to this result 3 then the result shoulb be 7 or 5 and some more

[@beastpubg1862]

Epic😍

[@Catabatic]

Thanks u khan academy:p

[@emmanuelekong1077]

hard

[@tulsikumari9284]

Thanks

[@kae052687]

🌈

[@nishasharma5509]

Wow sir

[@luisvasquezdonado4224]

When the denominator is the same, you can just look at 8 divided by 1 = 8 and disregard looking at it as a fraction.

[@leigha4626]

If only I understood what he was saying.

[@horrible_player]

Would this way work using the reciprocals of 1/3 and multiply it by 8/3 :D

[@horrible_player]

lol sorry I like this guy but its = to its = to its = to 8

[@horrible_player]

he repeats himself a lot and I think I could have made so spelling errors

[@kenanalmadhi9225]

Nice

[@baboydamo6912]

Heyoo! May i ask you how to solve this? 1/1/2 and 3/4/5 plss heeelp....

[@sidaksandhu1417]

the 1st one is .5

[@958rocket7]

I think his work is already late.......

[@sidaksandhu1417]

mb bruh I was just tryn to help@@958rocket7

[@anushkabhandari9508]

4 over three

[@saiphy5090]

Didnt helpi need this dud to go to the main art

[@abigailwilson8600]

Kinda sounds like he's saying right turds

[@nextgenevoadog8776]

Most confused

[@wyre1824]

There are some fraction sums that this doesn’t work for

[@TensaiV]

i dont get it. im never going to pass my end of year test

[@what6893]

ScRaPz_246 Keep the first fraction, flip the second one upside-down, then change the operation to multiplication. Example of flipping a fraction: 1/2 turns into 2/1. 3/4 × 1/2 turns into 3/4 × 2/1. Then you multiply. 3/4 × 2/1= 6/4. Then you simplify. 6÷4= 1.5 or 1 1/2 So, 3/4 ÷ 1/2= 1 1/2

[@ryancoleman303]

Question. If I have 3 over (x+5 divided by 9) -4. I know I find the reciprocal(9/x+5) but do I multiple the whole equation or just the denominator?

[@eugenepan7763]

¿No sé? Hágalo usted mismo por favor.

[@Pov3e]

This comment is to the people who havent understood this video. So basically to divide fractions you have to first find the reciprocal(just invert it ex. 1/3=3/1) of the second number then you have to multiply it and thats it! ex: 8/5 ÷ 2/3 = 8/5 x 3/2 = ~*24/10= 2 4/10*~

[@B-E-S-T46]

8÷1=8, easy!

[@dominicprince1830]

Baaah ima aleep