if price of t . v set is reduced by 18 % , then its sale increases by 88 % , find net effect on sale value
"- a + b + ( ( - a ) ( b ) / 100 ) = - 18 + 88 + ( - 18 * 88 ) / 100 = - 18 + 88 - 16 = 54 answer : b"
multiply(subtract(multiply(divide(subtract(const_100, 18), const_100), divide(add(const_100, 88), const_100)), const_1), const_100)