A washing and dyeing factory plans to use 500 tons of water in the first half of the year, but actually uses 488 tons of water. What percentage of water is saved?
某洗染厂，上半年计划用水500吨，实际用水488吨，节约用水百分之几？
<gadget id="calculator">500 - 488</gadget>
<output>12</output>

<gadget id="calculator">12 / 500</gadget>
<output>3/125 = around 0.024</output>

<result>3/125 = around 0.024</result>