village has dug a 2,500-meter canal, 1,500 meters have been dug, what percentage is left undug?
某村挖一条2500米的水渠，已经挖了1500米，还剩百分之几没有挖？
<gadget id="calculator">2_500 - 1_500</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 / 2_500</gadget>
<output>2/5 = around 0.4</output>

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