the present population of a town is 4032 . population increase rate is 20 % p . a . find the population of town before 2 years ?
"p = 4032 r = 20 % required population of town = p / ( 1 + r / 100 ) ^ t = 4032 / ( 1 + 20 / 100 ) ^ 2 = 4032 / ( 6 / 5 ) ^ 2 = 2800 ( approximately ) answer is b"
add(4032, divide(multiply(4032, 20), const_100))