Question

after selling 72 artcle a man earn a profit of sp of 9 artical,find profit
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Answer 1

$SP \: \: of \: \: 72 \: \: articles = x \\ \\ SP \: \: of \: \: 1 \: \: article = \frac{x}{72} \\ \\ SP \: \: of \: \: 9 \: \: articles = \frac{x \times 9}{72} = \frac{x}{8}$

Here,

${ \large{Profit = \frac{x}{8} }} \\ \\ { \large{then }} \\ \\ \: \: \: \: \: \: \: \: \: \: \: CP = SP - Profit \\ \\ \: \: \: \: \: \: \: \: \: \: \:CP = x - \frac{x}{8} \\ \\ \: \: \: \: \: \: \: \: \: \: \:CP = \frac{7x}{8}$

Now,

$Gain\% = \frac{gain}{cp} \times 100 \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{ \frac{x}{8} }{ \frac{7x}{8} } \times 100 \\ \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{x \times 8}{7x \times 8} \times 100 \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{100}{7} \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 14 \frac{2}{7}\%$







${ \huge{\red{MARK\:\:BRAINLIEST !!!!!}}}$