the banker ' s gain on a sum due 3 years hence at 12 % per annum is rs . 270 . the banker ' s discount is :
t . d = ( b . gx 100 ) / ( r / t ) = ( 270 x 100 ) / ( 12 x 3 ) = rs . 750 b . d . = rs . ( 750 + 270 ) = rs . 1020 . answer : d
add(270, divide(multiply(270, const_100), multiply(12, 3)))