A 10-kilometer-long road, the road construction team repaired it (1/4) on the first day, repaired its (1/5) on the second day, and repaired a fraction of it on the third day to complete the repair. section of road?
一段10千米长的公路，修路队第一天修了它的(1/4)，第二天修了它的(1/5)，第三天要修它的几分之几才能修完这段公路？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">1 - (1/4) - (1/5)</gadget>
<output>11/20 = around 0.55</output>

<result>11/20 = around 0.55</result>