Problem: a towel , when bleached , lost 30 % of its length and 20 % of its breadth . what is the percentage decrease in area ?
Rationale: percentage change in area = ( − 30 − 20 + ( 30 × 20 ) / 100 ) % = − 44 % i . e . , area is decreased by 44 % answer : c
annotated_formula: divide(subtract(multiply(const_100, const_100), multiply(subtract(const_100, 30), subtract(const_100, 20))), const_100)