Aunt Li completed the task of 5 days in 4 days, how much time she completed the task was shortened than before.
李阿姨4天完成了5天的工作任务，她完成任务的时间比原来缩短了多少．
<gadget id="calculator">5 - 4</gadget>
<output>1</output>

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

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