SOLUTION: How do I subtract and add unlike fractions? For example I am trying to subtract 13/15-11/20? What do I do step by step?

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Question 404932: How do I subtract and add unlike fractions? For example I am trying to subtract 13/15-11/20? What do I do step by step?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
13/15-11/20
Find a common denominator. The product always works 15*20 = 300
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13/15-11/20 = 260/300 - 165/300 = 95/300
= 19/60