To build a 36-kilometer road, 27 kilometers have been built, what percentage of this road is left unfinished?
修一条36千米的公路，已经修了27千米，这条路还剩下百分之几没修？
<gadget id="calculator">36 - 27</gadget>
<output>9</output>

<gadget id="calculator">9 / 36</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>