Question

A person earns $Rs.100$ in a day. If he spents $Rs.14\frac{2}{7}$ on food and $Rs.30\frac{2}{3}$ on petrol. How much did he save on that day?

Answer 1

Given
A person's earning in a day $=Rs.100$
Money spent on food $=Rs.14\frac{2}{7}=Rs.100/7$
Money spent on petrol $=Rs.30\frac{2}{3}=Rs.92/3$
The savings of a person is calculated as follows:
Savings $=Rs.100-\left\{\right(100/7+92/3\left)\right\}$
$=Rs.100-\left\{\right(300+644\left)/21\right\}$
On further calculation, we get
$=Rs.100-\left(944/21\right)$
$=(2100-944)/21$
$=Rs.1156/21$
$=Rs.55\frac{1}{21}$
Hence, a person saved Rs. $55\frac{1}{21}$ on that day.