During a special promotion, a certain filling station is offering a 10 percent discount on gas purchased after the first 6 gallons. If Kim purchased 20 gallons of gas, and Isabella purchased 25 gallons of gas, then Isabella‟s total per-gallon discount is what percent of Kim‟s total per-gallon discount? Options:	A) 80%	B) 100%	C) 109%	D) 120%	E) 140%
Kim purchased 20 gallons of gas. She paid for   6 + 0.9*14= 
<gadget id="calculator">  6 + 0.9*14</gadget>
<output>18.6</output>
18.6 gallons, so the overall discount she got was 1.4/20= 7%.   Isabella purchased 25 gallons of gas. She paid for   6 + 0.9*19= 
<gadget id="calculator">  6 + 0.9*19</gadget>
<output>23.1</output>
23.1 gallons, so the overall discount she got was 1.9/25= 7.6%.   7.6 is 7.6/7*100 = 109% of 7.   Answer: 109%.
<result>C</result>
During a special promotion, a certain filling station is offering a 10 percent discount on gas purchased after the first 6 gallons. If Kim purchased 20 gallons of gas, and Isabella purchased 25 gallons of gas, then Isabella‟s total per-gallon discount is what percent of Kim‟s total per-gallon discount?