by selling an article at rs . 150 , a profit of 25 % is made . find its cost price ?
"sp = 150 cp = ( sp ) * [ 100 / ( 100 + p ) ] = 150 * [ 100 / ( 100 + 25 ) ] = 150 * [ 100 / 125 ] = rs . 120 answer : d"
divide(multiply(150, const_100), add(const_100, 25))