SOLUTION: I got an 87% on a test with 75 questions...how many did I miss?

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Question 363159: I got an 87% on a test with 75 questions...how many did I miss?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
13%=13%2F100=X%2F75
X=%2875%2A13%29%2F100
X=9.75
Round up to 10 problems missed.