a person lent a certain sum of money at 4 % per annum at simple interest and in 8 years the interest amounted to rs . 272 less than the sum lent . what was the sum lent ?
"p - 272 = ( p * 4 * 8 ) / 100 p = 400 answer : a"
divide(272, subtract(const_1, divide(multiply(4, 8), const_100)))