Question

By selling 100 mangoes, a fruit seller gains the S.P. of 20 mangoes. Find his gain%.

Answer 1

SP of 1 mango = x (let)

SP of 100 mangoes = 100 x

gain = SP of 20 mangoes = 20 x

CP of 100 mangoes = SP of 100 mangoes - gain

$=100x-20x$

$=80x$

gain percentage = $\frac{gain}{CP}\times 100$

$=\frac{20x}{80x}\times 100$

$=25\%$