The same section of road takes 8 hours for a truck and 10 hours for a passenger car. How much slower is the speed of the passenger car than the speed of the truck?
同一段路，货车要行8小时，客车要行10小时，客车的速度比货车的速度慢多少
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/8) - (1/10)</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">(1/40) / (1/8)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>