SOLUTION: Robert got 2 questions wrong on a test of 24 questions. What percent of the questions did he get correct?

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Question 1081537: Robert got 2 questions wrong on a test of 24 questions. What percent of the questions did he get correct?
Answer by chen(11) About Me  (Show Source):
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He got 22 out of 24 questions correct, so 22/24, i.e. 91,67% correct.