If the price of gasoline increases by 20% and a driver intends to spend only 8% more on gasoline, by how much percent should the driver reduce the quantity of gasoline that he buys?	Choose the correct choice from the following.
A) 4% B) 5% C) 6% D) 8% E) 10%
Let x be the amount of gasoline the driver buys originally.   Let y be the new amount of gasoline the driver should buy.   Let P be the original price per liter.   (1.2*P)y = 1.08(P*x)   y = (1.08/1.2)= 
<gadget id="calculator">(1.08/1.2)</gadget>
<output>0.9</output>
0.9x which is a reduction of 10%.   The answer is 10%.
<result>E</result>
If the price of gasoline increases by 20% and a driver intends to spend only 8% more on gasoline, by how much percent should the driver reduce the quantity of gasoline that he buys?