at what price must an article costing rs . 200 be marked in order that after deducting 10 % from the list price . it may be sold at a profit of 20 % on the cost price ?
"cp = 200 sp = 200 * ( 120 / 100 ) = 240 mp * ( 90 / 100 ) = 240 mp = 266.67 answer : c"
divide(multiply(add(200, divide(multiply(200, 20), const_100)), const_100), subtract(const_100, 10))