a reduction of 20 % in the price of salt enables a lady to obtain 25 kgs more for rs . 100 , find the original price per kg ?
"100 * ( 20 / 100 ) = 20 - - - 25 ? - - - 1 = > rs . 0.8 100 - - - 80 ? - - - 0.8 = > rs . 1 answer : b"
multiply(divide(divide(multiply(divide(20, const_100), 100), 25), multiply(divide(20, const_100), 100)), const_100)