if the true discount on a sum due 2 years hence at 14 % per annum be rs . 168 , the sum due is :
solution p . w = 100 xt . d . / r x t = 100 x 168 / 14 x 2 = 600 . ∴ sum = ( p . w . + td . ) = rs . 768 . answer a
add(divide(multiply(const_100, 168), multiply(14, 2)), 168)