a person lent a certain sum of money at 4 % per annum at simple interest and in 8 years the interest amounted to rs . 306 less than the sum lent . what was the sum lent ?
"p - 306 = ( p * 4 * 8 ) / 100 p = 450 answer : e"
divide(306, subtract(const_1, divide(multiply(4, 8), const_100)))