The processing of a batch of parts is planned to be completed in 25 days, but actually completed in 20 days, the time is shortened ((())/(())).
加工一批零件计划25天完成，实际20天完成，时间缩短了((())/(()))．
<gadget id="calculator">25 - 20</gadget>
<output>5</output>

<gadget id="calculator">5 / 25</gadget>
<output>1/5 = around 0.2</output>

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