Question

A coolie deposits Rs 150 per month in his post office Savings Bank account. If this is 15% of his monthly income, find his monthly income.

Answer 1

$$\begin{gathered} \mathrm{Let}\mathrm{his}\mathrm{monthly}\mathrm{income}\mathrm{be}\mathrm{Rs}\mathrm{x}. \\ \mathrm{Then},15\%ofx=150 \\ \Rightarrow \frac{15}{100}x=150 \\ \Rightarrow x=\frac{150\times 100}{15} \\ =1000 \\ \therefore \mathrm{His}\mathrm{monthly}\mathrm{income}\mathrm{is}\mathrm{Rs}1000. \end{gathered}$$