The engineering team wants to repair a 400-meter path, and 280 meters have been repaired. What percentage of the road is left to be repaired?
工程队要修一条400米的小路，已经修好了280米，还剩下百分之几的路没有修好？
<gadget id="calculator">400 - 280</gadget>
<output>120</output>

<gadget id="calculator">120 / 400</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>