by selling an article at rs . 800 , a profit of 25 % is made . find its cost price ?
sp = 800 cp = ( sp ) * [ 100 / ( 100 + p ) ] = 800 * [ 100 / ( 100 + 25 ) ] = 800 * [ 100 / 125 ] = rs . 640 answer : c
divide(multiply(800, const_100), add(const_100, 25))