SSC CHSL 10 Aug 2021 Shift 1 Paper

Let the income of the person be ₹ $\mathit{x}$.
$\therefore$ Saving $=25\%$ of $\mathit{x}=025\mathit{x}$
$\therefore$ Expenditure $=\mathit{x}-0.25\mathit{x}=\mathit{₹}0.75\mathit{x}$
Now, new income $=120\%$ of $\mathit{x}=\mathit{₹}1.2\mathit{x}$
and new saving $=$ old saving $=\mathit{₹}0.25\mathit{x}$
$\therefore$ New expenditure $=1.2\mathit{x}-0.25\mathit{x}$ $=\mathit{₹}0.95\mathit{x}$
$\therefore$ Percentage increase in expenditure
$=\frac{\left(0.95\mathit{x}-0.75\mathit{x}\right)}{0.75\mathit{x}}\times 100$
$=26\frac{2}{3}\%$