Question

the population of a city increases 15% annually ,if the present population is 20700 what was the population year ago

plzz give ans with method.....

Answer 1

Let us take the population one year ago be x.
Then the population after one year = 115x/100.
But it is given 20700.
So Atq. ,115x/100= 20700
Plz mark brainliest
or x.= 20700×100/115
Therefore x =18000.
Therefore the population one year was 18000.

Answer 2

----------------------------------------

Here is the solution:

----------------------------------------

increased in population = 15%

Find the percentage of population compared to last year:

100 + 15 = 115%

Find the population last year:

Percentage this year = 115%

Population this year = 20700

115% = 20700

1% = 20700 ÷ 115  = 80

100% = 180 x 100 = 18,000

Answer: The population last year was 18,000