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sdmatera
You have to make each fraction have the same denominator and then add the numerators but keep the denominator the same.

For example:
1/2+1/4 (I need to multiply the first fraction by 2 to get a denom. of 4)

2/4+1/4 (add the numerators and keep the denom.)

=3/4

Hope this helps!
datxtramanda
First, you find a common denominator example 10 and 5, they both have 10 in there. (5,10,15,20) (10,20,30,40) You see a common number which is 10.

You make that your denominator and then whatever times 10 in the five factor will be how much you multiply by. Hope that helped!

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