To build a section of road, the ratio of the ones that have been repaired to the ones that have not been repaired is 5:4, and those who have built this section of road ((())/(())).
修一段公路，已修的和未修的比为5：4，已修了这段公路的((())/(()))．
<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<result>5/9 = around 0.555556</result>