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20 August, 10:09

When a number is decreased by 20% of itself, the result is 20. What is the number?

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  1. 20 August, 10:35
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    Decreased by 20% means multiplied by 80%

    80% of number=20

    divide both sides by 4

    20% of number=5

    times 5 both sides

    100% of number=25

    the number is 25
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