Dividing Fractions





Introduction: Dividing Fractions

Burning Questions Round 6.5

First Prize in the
Burning Questions Round 6.5

How to divide fractions!
This instructable is an entry to the Burning Questions Round 6.5 contest.
The fraction images were generated using this site

Step 1: Reciprocate the Second Fraction

To divide fractions we first need to reciprocate the second fraction(See first image).
This just means we switch the positions of the numerator(top number) and denominator (bottom number) (See second image).
Then, after reciprocating the fraction we need to change the divide sign to a multiply(See third image).
In this example using 1/2 / 1/3, we are left with 1/2 X 3/1.

Step 2: Do the Multiplication

Now all you have to do is the multiplication(See image).
If you don't know how to multiply fractions, then check out my other instructable called Multiplying Fractions. Remember to simplify your result if necessary. If you cross-cancel the multiplication, (again, see Multiplying Fractions) remember that you must cross cancel AFTER you convert the divide to multiply, NOT before!!!



    • Science of Cooking

      Science of Cooking
    • Microcontroller Contest

      Microcontroller Contest
    • Spotless Contest

      Spotless Contest

    We have a be nice policy.
    Please be positive and constructive.




    is the answer to the first one 42/32

    My school says keep flip switch

    U keep first number ,switch it to multiplication, and switch the 2nd fraction

    I still don't get it because all of my math problems are different.


     A way to remember is "kiss 'n' flip". You kiss (x from xoxo) then you flip the fraction on the right.

    nice job on the win, beat me :D

    Yeah, thanks. Your instructable was good too and you got like 250 more pageviews!

    lol i know! oh well, theres always other contests!