If the price of gasoline increases by 25% and a driver intends to spend only 20% more on gasoline, by how much percent should the driver reduce the quantity of gasoline that he buys?	Choose the correct choice:	A) 2%	B) 3%	C) 4%	D) 5%	E) 6%
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.   (1.25*P)y = 1.2(P*x)   y = (1.2/1.25)= 
<gadget id="calculator">(1.2/1.25)</gadget>
<output>0.96</output>
0.96x which is a reduction of 4%.   The answer is 4%.
<result>C</result>
If the price of gasoline increases by 25% and a driver intends to spend only 20% more on gasoline, by how much percent should the driver reduce the quantity of gasoline that he buys?