When the price of a radio was reduced by 20%, its sale increased by 80%. What was the net effect on the sale?
Choose the most appropriate option
A) 44% increase  B) 44% decrease  C) 66% increase  D) 75% increase  E) None of these
Let the original price be x and sale be of y units.   Then, the revenue collected initially = x × y   Now, new price = 0.8x, new sale = 1.8y   Then, new revenue collected = 1.44xy   % increase in revenue = 0.44xy/xy×100   = 44% increase   44% increasenswer 44% increase
<result>A</result>
When the price of a radio was reduced by 20%, its sale increased by 80%. What was the net effect on the sale?