If the length of a rectangle is increased by 20% and the breadth is reduced by 20%, what will be the effect on its area?
Select the correct option
A) 4 % increase B) 6 % increase C) 5 % decrease D) 4 % decrease E) none of these

Rationale: percentage change = x - y - xy ⁄ 100 = 20 – 20 – 20 × 20 / 100 = − 4 % = 4 % decrease answer d
Answer: D