If the price of gasoline increases by 25% and Ron intends to spend only 15% more on gasoline, by how much percent should he reduce the quantity of gasoline that he buys?  Choose the correct answer:
A) 6.66%  B) 8%  C) 10%  D) 12%  E) 12.5%
Let price of original price of gasoline = 10$   and let original consumption of gasoline = 10   Amount spend on gasoline originally = 10*10= 
<gadget id="calculator">10*10</gadget>
<output>100</output>
100$   the price of gasoline increases by 25% and Ron intends to spend only 15% more on gasoline   Increased price of gasoline= 12.5$   Now Ron intends to spend on gasoline =1.15*100= 
<gadget id="calculator">1.15*100</gadget>
<output>115</output>
115$   Consumption of gasoline needs to be= 115/12.5   = 1150/125   = 46/5= 
<gadget id="calculator">46/5</gadget>
<output>46/5 = around 9.2</output>
9.2   Reduction in consumption of gasoline= 10-9.2= 
<gadget id="calculator">10-9.2</gadget>
<output>0.8</output>
.8   % reduction in consumption of gasoline= .8/10 * 100= 
<gadget id="calculator">.8/10 * 100</gadget>
<output>8</output>
8%   Answer 8%
<result>B</result>
If the price of gasoline increases by 25% and Ron intends to spend only 15% more on gasoline, by how much percent should he reduce the quantity of gasoline that he buys?