Question

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

Answer 1

Let the total money be $x$

now, money she spend $=\frac{90x}{100}$

Money she shave $=120$

Now,

$\Rightarrow \frac{90x}{100}+120=x$

$\Rightarrow x-\frac{90x}{100}=100$

$\Rightarrow \frac{10x}{100}=120$

$\Rightarrow x=\frac{120\times 100}{10}$

$=1200$

She earn $1200.$

Hence, the answer is $1200.$