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1 October, 14:55

The percentage score on a test varies directly as the number of correct responses. Stan answered 29 questions correctly and earned a score of 87. What would Stan's percentage score have been if he had answered 25 questions correctly?

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  1. 1 October, 17:17
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    87 / 29 = x / 25 ... score 87 to 29 answers = score x to 25 answers

    cross multiply because this is a proportion

    (29) (x) = (25) (87)

    29x = 2175

    x = 2175/29

    x = 75 < = = = Stan's percentage score when answering 25 q's correctly
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