Question

A number decreased by 27½ percent gives 87. The number is.

Answer 1

$x - x \times \frac{27.5}{100} = 87 \\ \frac{100x - 27.5x}{100} = 87 \\ \frac{72.5x}{100} = 87 \\ 72.5x = 8700 \\ x = \frac{8700}{72.5} \\ = 120$
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Answer 2

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