Multiplication and Division of Fractions

If we know how to add and subtract fractions, we should know how to multiply and divide them too, right? Don't worry, it's actually even easier than adding and subtracting them, because when we multiply two fractions, they don't have to have the same denominator, like when we add them. And dividing by a fraction is the same as multiplying by its reciprocal. It's all in here, take a look!

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[ProfessorDaveExplains]

Oh no!!! At @ I say "one times anything is one", which is a horrendous misspeak on my part! I should have said "anything times one is itself", as here, three times one remains three. Sorry!

[amchedli]

Hey Prof. Dave, should the last problem be simplified to 7/4, as opposed to staying at 21/12? thanks .

[stevemitchell]

I've got no real reason for being here, but I watched anyway & you've reminded me ( I'm 55) how easy dividing fractions is.
I think I'll keep watching a few more, great work 👍

[antoinettemarsh]

Thank you for helping me to understand this topic in math

[pkgirl]

Thanks for teaching me how to do this but it was easy on it's own so thank you for your help I learnt mine from google online

[ibmmncn]

It helps me doing mathematics good thanks you

[salmank]

Hello professor dave i just found your channel and i m addicted now...

[yuinurahilyon]

Professor Dave, I’ve got a question, if it’s multiplying and dividing by fractions. Then shouldn’t the answer for no.1 problem be (2/9)(11/4) since it’s a fraction? That 11 which is the dividend is greater than the divisor which is a fraction. Then you could simplify it by (22/32)=(11/16) instead of the solution (8/99)? I apologize if my question is a bit silly. But I have a tiny trouble understanding why the answer is (8/99).

[asjsk]

gracias por el video, aprendo mates y tambien mejoro mi inglés

[MouthTutorials]

ur one of the only teachers ik that opens the chat

[gulabmishra]

Sir explain carbon atom outer shall 4 electron and it's great property bond formation why sir with animation

[gulabmishra]

Sir ji why florin highly reactivate elements in periodic table

[g.r.]

20/165 on my way there. Thank you Prof. Dave. This series should be preserved for future generations.

[elyanhriz]

thank you for all that but can you please explain how 3/10 / 5/4 =3/8 in should have to be 3/10*4/5=12/50 is that right ?

[MiltosPol-qnzh]

When you make videos for geometry, can you explain lobatchevskys and Riemanns geometry???

[satyateja]

please make a video on basics of statistics.

[physicsphuntime]

You said 1 times anything is one around 2:15

[passiongreen]

Thank you you have helped me and I liked the video

[geneva]

I'm shocked you didn't teach the butterfly method. Great video though, and i always prefer a technical explination, we all learn differently though.

[Stoirelius]

The first and third exercises are wrong, the answers should be 11/18 and 6/25