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受欢迎的 Word Problems >

a number that when decreased by 30% is 40

解答

a n u mb er t ha t w h e n d ecre a se d b y 30% i s 40

解答

Amount before reduction : 57.14285 \dots

求解步骤

Translate the problem into an equation:

40 = x - 0.3 x

40 = x - 0.3 x : x = \frac{400}{7}

\frac{400}{7} = 57.14285 \dots

Amount before reduction : 57.14285 \dots

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