SOLUTION: Robert got an 84% on his last exam if he answered 42 questions correctly, how many questions were there on the exam?

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Question 774583: Robert got an 84% on his last exam if he answered 42 questions correctly, how many questions were there on the exam?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Robert got an 84% on his last exam if he answered 42 questions correctly,
how many questions were there on the exam?
:
let n = number questions on the exam
:
42%2Fn = .84
42 = .84n
n = 42/.84
n = 50 questions