Question

THE PRICE OF A PENCIL INCREASES FROM Rs.4 TO Rs.5.FIND THE % INCREASE.

Answer 1

$$\begin{gathered} \mathrm{Oroginal}\mathrm{price}\mathrm{of}\mathrm{pencil}=\mathrm{Rs}4 \\ \mathrm{New}\mathrm{price}\mathrm{of}\mathrm{pencil}=\mathrm{Rs}5 \\ \mathrm{Increase}=5-4=\mathrm{Re}1 \\ \mathrm{Increase}\%=\left[\frac{\mathrm{increase}}{\mathrm{original}\mathrm{price}}\times 100\right]\%=\left[\frac{1}{4}\times 100\right]\%=25\% \end{gathered}$$