A car drives from point A to point B and back, if the ratio of the round trip time is 5:4, how much is the return speed increased compared to the time of going?
一辆汽车从甲地开往乙地然后返回，如果往返所用时间的比是5：4，那么返回时的速度比去时提高了多少
<gadget id="calculator">5 - 4</gadget>
<output>1</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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