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Ted took a test with 40 question. He received a score of 90% how much did he answer correctly

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  1. 27 May, 15:54
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    X/40=90%

    percent means parts out of 100

    90%=90/100=9/10

    x/40=9/10

    times both sides by 40

    x=4*9

    x=36

    he answered 36 correctly
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