Question

Alka spends 90% of the money that she receives every month, and saves Rs. 120. How much money does she get monthly ?

Answer 1

Let her monthly income be Rs x.
Savings = Rs 120
Expenditure = $90\%\mathrm{of}x=\frac{90}{100}x=\frac{9x}{10}$
Savings = Total monthly salary $-$ Expenditure = $x-\frac{9x}{10}=\frac{x}{10}$ = 120
$x=10\times 120=1200$
Thus, total monthly salary = Rs 1200