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

Step 1: Multiplying whole numbers

Picture of Multiplying whole numbers
To whole numbers we simply do this: (See image)
 
AlliP11 months ago

how do you multiply them if neither number can go into each other when cross reducing, would you just keep the same number?

dolphinlms3 years ago
This could have been cross cancelled two more times. The 9 & 3 (either denominator!) could be cross cancelled so you would have either 3/1 x 7/3 = 1/1 x 7/1 = 7 OR 3/3 x 7/1 = 1 x 7 = 7. I review this with 6th graders by writing a ridiculously long multiplication problem to demonstrate how much you can simplify a problem.
wow, education is very important !!
I'm WITH YOU ON THIS ONE!!! EDUCATION IS LIKE PIZZA !!! YOU CAN'T GET ENOUGH!!!
but i think you can cancel from the top and the bottom of the same fraction because it is just the same thing as a diagonal (it's one of the properties of multiplication)