a towel , when bleached , lost 30 % of its length and 15 % of its breadth . what is the percentage decrease in area ?
"percentage change in area = ( − 30 − 15 + ( 30 × 15 ) / 100 ) % = − 40.5 % i . e . , area is decreased by 40.5 % answer : b"
divide(subtract(multiply(const_100, const_100), multiply(subtract(const_100, 30), subtract(const_100, 15))), const_100)