Question

solved question number 5

Answer 1

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$cost \: price = 4 \times 10 = 40 \\ \\ selling \: price = 4 \times 8 = 32 \\ \\ loss = cp - sp = 40 - 32 = 8 \\ \\ loss\% = \frac{loss}{cp} \times 100 \\ \: \: \: \: \: \: \: \: \: \: \: \: = \frac{8}{40} \times 100 \\ \: \: \: \: \: \: \: \: \: \: \: \: = \frac{1}{5} \times 100 \\ \: \: \: \: \: \: \: \: \: \: \: \: = 20\% \\ \\ hence \: loss \: is \: equal \: to \: 20\%$
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