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23 October, 19:26

Sarah's English test had 90 questions and she got 18 questions wrong. What percent of the questions did she get correct?

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  1. 23 October, 19:35
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    So,

    Sarah got 72/90 questions correct.

    Simplify 72/90

    72 = 2 * 2 * 2 * 3 * 3

    90 = 2 * 3 * 3 * 5

    Cross out "ones"

    2 * 2 over

    5

    4/5 = 80%

    Sarah got 80% of the questions correct
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