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19 November, 16:07

42% of what number is 0.21?

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  1. 19 November, 19:46
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    Answer: 0.5

    Step-by-step explanation:

    Let the number be x, then

    42% of x = 0.21

    0.42x = 0.21

    divide through by 0.42

    x = 0.21/0.42

    x = 0.5

    Therefore : 42% of 0.5 = 0.21
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