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7 June, 14:29

Judy got 117 problems right on a math test in her night school class. She got a score of 78% right. How many problems were on the test?

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  1. 7 June, 14:55
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    You would set this up as Part:Whole=Percent:100

    Part=117

    Whole = X

    Percent=78

    117:X=78:100

    Set these up as fractions and cross multiply. You will get 117*100=78X

    117*100=11,700

    Divide both sides by 78 and you get x=150

    There were 150 problems
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