When the price of an article was reduced by 20% its sale increased by 80%. What was the net effect on the sale?  Answers: A) 44 % increase B) 44 % decrease C) 60 % increase D) 66 % increase E) 66 % decrease

Rationale: "if n items are sold for $ p each , revenue is $ np . if we reduce the price by 20 % , the new price is 0.8 p . if we increase the number sold by 80 % , the new number sold is 1.8 n . so the new revenue is ( 0.8 p ) ( 1.8 n ) = 1.44 np , which is 1.44 times the old revenue , so is 44 % greater . answer : a"
Answer: A