Question

When Vijay sells $12$ pens, he gains the selling price of $2$ pens. Calculate his gain percentage.

Answer 1

Calculate his gain percentage.

Let the selling price of one pen be $\mathrm{Rs}.1$

Selling price of $12$ pens $=\mathrm{Rs}.12$

Profit $=$ Selling price of $2$ pens

$=\mathrm{Rs}.2$

Now,

$$\begin{gathered} \mathrm{Cost}\mathrm{price}=\mathrm{Selling}\mathrm{price}-\mathrm{Profit} \\ =12-2 \\ =\mathrm{Rs}.10 \end{gathered}$$

And

$$\begin{gathered} \mathrm{Profit}\%=\frac{\mathrm{Profit}}{\mathrm{cost}\mathrm{price}}\times 100 \\ =\frac{2}{10}\times 100 \\ =20\% \end{gathered}$$

Thus, the profit percentage is $20\%$.