Question

If selling price of $5$ pencils is equal to cost price of $6$ pencils, find the profit or loss $\%$.

Answer 1

Given, selling price of 5 pencils $=$ cost price of pencils

Let us assume cost price of 1 pencil is Rs. $x$

selling price of 5 pencils $=6x$

Selling price of 1 pencils $=\frac{6x}{5}$

Profit = $\frac{6x}{5}-x=Rs.\frac{x}{5}$

profit $\%=\frac{profit}{C.P}\times 100$

$=\frac{x/5}{x}\times 100=20\%$