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3/8 + -2/5 + 7/8 - 4/5 = ..................

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3/8 + -2/5 + 7/8 - 4/5 = ..................

A) 1/3

B) 1/20

C) -1/4

D) -1/20 

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2 Answers

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Correct option is (B) 1/20

\(\frac{3}{8}+\frac{-2}{5}+\frac{7}{8}-\frac{4}{5}\) \(=\frac{3\times5-2\times8+7\times5-4\times8}{40}\) \(=\frac{15-16+35-32}{40}\) \(=\frac{-1+3}{40}=\frac{2}{40}=\frac{1}{20}.\)

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Correct option is  B) 1/20 

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