The annual rate of growth in population of a certain city is 8% . If it's present population is 196380, what was it 3 years ago ?​

Explanation

Let '3' years ago, the population of a city = 'P'
Rate of growth (R) =`8`%p.a.
Present population (P) = `196830`
Period (n) = `3`years
`P=A/(1+R/100)^n`
P=`196830/(1+8/100)^3`
`=196830 /(27/25)^3`
`P=156250`