Wangcun produces 250 tons of cotton this year, which is 50 tons more than last year. What percentage is the increase this year compared to last year?
王村今年生产棉花250吨，今年比去年多生产50吨，今年比去年增产百分之几？
<gadget id="calculator">250 - 50</gadget>
<output>200</output>

<gadget id="calculator">50 / 200</gadget>
<output>1/4 = around 0.25</output>

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