The road construction team built a road, the road was built on the first day (3/8), and the road was built on the second day (2/5), what percentage of the road was built in two days?
修路队修一条路，第一天修了这条路的(3/8)，第二天修了这条路的(2/5)，两天共修这条路的几分之几？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/8) + (2/5)</gadget>
<output>31/40 = around 0.775</output>

<result>31/40 = around 0.775</result>