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
if n items are sold for $p each, revenue is $np. If we reduce the price by 20%, the new price is 0.8p. If we increase the number sold by 80%, the new number sold is 1.8n. So the new revenue is (0.8p)(1.8n) = 1.44np, which is 1.44 times the old revenue, so is 44% greater.   44% increaseNSWER:44% increase
<result>A</result>
When the price of an article was reduced by 20% its sale increased by 80%. What was the net effect on the sale?