To build a road, the whole road (2/5) was built on the first day, and some parts were repaired on the second day. At this time, (1/4) of the whole road was not repaired, and a fraction of the whole road was repaired on the second day ?
修一条公路，第一天修了全路的(2/5)，第二天又修了一些，这时还剩全路的(1/4)没有修，第二天修了全路的几分之几？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">1 - (2/5) - (1/4)</gadget>
<output>7/20 = around 0.35</output>

<result>7/20 = around 0.35</result>