To build a 24-kilometer expressway, 21 kilometers have been built, what percentage of the total length has been repaired?
修一条24千米的高速公路，已经修了21千米，修了全长的百分之几？
<gadget id="calculator">21 / 24</gadget>
<output>7/8 = around 0.875</output>

<result>7/8 = around 0.875</result>