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人気のある Word Problems >

The price of gasoline is currently 3.45, this is a 21% increase from a year ago. What was the price of gas a year ago.

解

T h e p r i ce o f g a so l in e i s c u rre n tl y 3.45, t hi s i s a 21% in cre a se f ro m a ye a r a g o . Wha t w a s t h e p r i ce o f g a s a ye a r a g o .

解

Amount before addition : 2.85123 \dots

解答ステップ

Translate the problem into an equation:

3.45 = x + 0.21 x

3.45 = x + 0.21 x : x = \frac{345}{121}

\frac{345}{121} = 2.85123 \dots

Amount before addition : 2.85123 \dots

人気の例

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