Xinhua Bookstore sold 2,000 books in March and 2,500 books in April. How much more did Xinhua Bookstore sell in April than in March?
新华书店三月份卖书2000本，四月份卖书2500本，新华书店四月份比三月份多卖百分之几？
<gadget id="calculator">2_500 - 2_000</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>