When the price of an article was reduced by 40% its sale increased by 80%. What was the net effect on the sale?	Choose the correct choice from the following options:  A) 8% increase  B) 4% decrease  C) 6% increase  D) 66% increase  E) 66% decrease
if n items are sold for $p each, revenue is $np. If we reduce the price by 40%, the new price is 0.6p. If we increase the number sold by 80%, the new number sold is 1.8n. So the new revenue is (0.6p)(1.8n) = 1.08np, which is 1.08 times the old revenue, so is 8% greater.   8% increaseNSWER:8% increase
<result>A</result>
When the price of an article was reduced by 40% its sale increased by 80%. What was the net effect on the sale?