The school pays 2,000 yuan for water in April and 1,500 yuan for water in May. How many percent did you save in May compared to April?
学校四月份付水费2000元，五月份付水费1500元．五月份比四月份节约了百分之几？
<gadget id="calculator">2_000 - 1_500</gadget>
<output>500</output>

<gadget id="calculator">500 / 2_000</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>