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?	Pick one:
A) 2 %
B) 3 %
C) 4 %
D) 5 %
E) 6 %
<gadget id="calculator">25 + 100</gadget>
<output>125</output>

<gadget id="calculator">20 + 100</gadget>
<output>120</output>

<gadget id="calculator">125 - 120</gadget>
<output>5</output>

<gadget id="calculator">5 / 125</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">(1/25) * 100</gadget>
<output>4</output>

<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?
multiply(divide(subtract(add(25, const_100), add(20, const_100)), add(25, const_100)), const_100)
"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 ) x = 0.96 x which is a reduction of 4 % . the answer is c ."