The school paid 2,000 yuan for water in February, which was 500 yuan less than in January. How much was the savings?
学校二月份付水费是2000元，比一月份节约500元，节约了百分之几？
<gadget id="calculator">2_000 + 500</gadget>
<output>2_500</output>

<gadget id="calculator">500 / 2_500</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>