Question

The population of a town increases by 8% annually. If the present population is 54000, what was it a year ago?

Answer 1

Let population of the town a year ago = Z 

∴ Present population = 108% of Z 

⇒ 54000 = Z × 108/100 

⇒ 54000 = Z × 27/25 

⇒ Z = 54000 × 25/27 

⇒ Z = 2000 × 25 

⇒ Z = 50000