SOLUTION: A student answers 80​% of the questions on a math exam correctly. If he answers 40 questions​ correctly, how many questions are on the​ exam?

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Question 1171589: A student answers 80​% of the questions on a math exam correctly. If he answers 40 questions​ correctly, how many questions are on the​ exam?
Answer by ikleyn(52797) About Me  (Show Source):
You can put this solution on YOUR website!
.

    0.8x = 40.

    x = 40%2F0.8 = 50.     ANSWER

Solved.