a towel , when bleached , lost 30 % of its length and 40 % of its breadth . what is the percentage decrease in area ?
"percentage change in area = ( − 30 − 40 + ( 30 × 40 ) / 100 ) % = − 58 % i . e . , area is decreased by 58 % answer : d"
divide(subtract(multiply(const_100, const_100), multiply(subtract(const_100, 30), subtract(const_100, 40))), const_100)