the present worth of $ 169 due in 2 years at 4 % per annum compound interest is ?
"present worth = 169 / ( 1 + 4 / 100 ) ^ 2 = 169 * 25 / 26 * 25 / 26 = $ 156.25 answer is c"
divide(169, power(add(divide(4, const_100), const_1), 2))