SOLUTION: If 75 is passing and there was 87 problems; up to how many could I get wrong?

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Question 303240: If 75 is passing and there was 87 problems; up to how many could I get wrong?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
To pass you need to get,
75%2F100=X%2F87
X=%2875%2A87%29%2F100
X=65.25
You'd need to get 65 correct to get a 75% (actually it's 74.7% so hopefully the teacher rounds up).
So you could miss (87-65=) 22 incorrect