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Popular Word Problems >

The average temperature this summer was 24° C. If the average temperature decreased by 8% from last summer, what was the average temperature last year?

Solution

T h e a v er a g e t e m p er a t u re t hi s s u mm er w a s 24° C . I f t h e a v er a g e t e m p er a t u re d ecre a se d b y 8% f ro m l a s t s u mm er, w ha t w a s t h e a v er a g e t e m p er a t u re l a s t ye a r ?

Solution

Amount before reduction : 26.08695 \dots

Solution steps

Translate the problem into an equation:

24 = x - 0.08 x

24 = x - 0.08 x : x = \frac{600}{23}

\frac{600}{23} = 26.08695 \dots

Amount before reduction : 26.08695 \dots

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