Nagaraj could save 10% of his income. But 2 years later, when his income increased by 20%, he could save the same amount only as before. By how much percentage has his expenditure increased ?

Answer: Option A

Let, his income be = Rs. 100
Saving = Rs. 10
Expenditure = Rs. 90
Increased income = Rs. 120
Increased expenditure = Rs. 110
Increased in expenditure :
$$\begin{array}{rl}& =\frac{110-90}{90}\times 100\\ & =\frac{200}{9}\\ & =22\frac{2}{9}\%\end{array}$$