It is known that the speed of the big tortoise is faster than the speed of the small tortoise (1/4), so how much slower is the speed of the small tortoise than the speed of the big tortoise?
龟比赛跑步，已知大乌龟的速度比小乌龟的速度快(1/4)，那么小乌龟的速度比大乌龟的速度慢百分之几？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(1/4) / (5/4)</gadget>
<output>1/5 = around 0.2</output>

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