Question

Out of his total income Kumar spend 25% on house rent and 80% of the remaining on other expenditure and save the rest. If he saves rupees 1890 per month what is his total income

Answer 1

$1890 \times5 = 9450$
that is 75% of his total income.
$9450 \div 3 = 3150$
3150 is his rent. so his total salary is 9450+3150= 12600

Answer 2

Answer:

let income be x

rent on house = 25% of x

= 25/100 ×x

= 1/4 x

other expenditure = 80% of x-1/4x

=80/100 × X-1/4X

=4/5×X-1/4X

so saving =

total income -rent-other expenditure = 1890

= X- 4/5X - 1/4 X =1890

4X-X / 20 = 1890

3x= 1890×20

x= 37800/3

x= 12600