To build a 500-meter-long road, 200 meters have been built, what percentage of this road has been built?
要修一条长500米的公路，已经修了200米，已经修了这条公路的百分之几？
<gadget id="calculator">200 / 500</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>