Question

A vegetable seller on selling 20kg potatoes earns a profit equal to the cost price of 5kg potatoes. Find his profit percentage?

Answer 1

Seller sells 20 kg potatoes
He earns a profit of C.P. of 5 kg potatoes.
$\therefore$ Profit percent = ?
Let, the C.P. of 1 kg potatoes = x
C.P of 5 kg = 5x = Profit
C.P of 20 kg potatoes = 20x
$\therefore$ Profit $\%=\frac{\text{/}5x}{\text{/}{20x}_4}\times \text{/}{100}^{25}$
$=25\%$