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how do you do fractions

 Oct 14, 2015
 #1
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+5

Find a common denominator 

 

2/3+4/5

the CD is 15 because 3 and 5 both go into them.

find how many time the bottom part of the first fraction can go into there. 

in this case, 3 can go into 15, 5 times

so then youll mutiple your top number by 5

 

repeat this for the next fraction

 

Once you have your four fractions, subtract the top of the two new fractions

in this case it'll be 10 and 12 

=2

 

then put that over 15 

 

=2/15

 Oct 14, 2015

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