It takes 16 hours for a train to travel from A to B, and 20 hours for a car to travel from A to B. How much faster is the train than the car?
一列火车从甲地到乙地要16小时，一辆汽车从甲地到乙地要20小时，火车的速度比汽车快百分之几？
<gadget id="calculator">1 / 16</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/16) - (1/20)</gadget>
<output>1/80 = around 0.0125</output>

<gadget id="calculator">(1/80) / (1/20)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>