To build a road, the whole road has been repaired (5/9), what fraction of the whole road is left to be repaired?
要修一条路，已经修好了全路的(5/9)，还剩全路的几分之几没修？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">1 - (5/9)</gadget>
<output>4/9 = around 0.444444</output>

<result>4/9 = around 0.444444</result>