SOLUTION: a student answered 87.5% of the exam correctly. if she answered 42 problems correctly, how many questions were therer on the exam?

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Question 297433: a student answered 87.5% of the exam correctly. if she answered 42 problems correctly, how many questions were therer on the exam?
Found 2 solutions by vleith, josmiceli:
Answer by vleith(2983) About Me  (Show Source):
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = number of questions on exam
42%2Fx+=+.875
.875x+=+42
x+=+42%2F.875
x+=+48
There were 48 questions on the exam