Question

The population of a certain town this year is 12480. If the rate of increase of the population is 4%, what was previous year's population?​

Answer 1

The previous year's population was 12000.

Explanation:

Let the previous year's population be P. Then:

P + 0.04P = 1.04P = 12480.

Solving 1.04P = 12480 results in P = 12000

The previous year's population was 12000.

Answer 2

Explanation:

12480*4/100

= 1248* 0.4

=499.2 is 4% of 1280

:. 1280 - 499.2

780.8 is previous year's population