Problem: by selling an article at rs . 300 , a profit of 25 % is made . find its cost price ?
Rationale: "sp = 300 cp = ( sp ) * [ 100 / ( 100 + p ) ] = 300 * [ 100 / ( 100 + 25 ) ] = 300 * [ 100 / 125 ] = rs . 240 answer : c"
annotated_formula: divide(multiply(300, const_100), add(const_100, 25))