A chemical fertilizer factory produces 1,500 tons of fertilizer this year, which is 300 tons more than last year. What percentage is the increase this year?
某化肥厂今年生产化肥1500吨，比去年多生产300吨，今年增产百分之几？
<gadget id="calculator">1_500 - 300</gadget>
<output>1_200</output>

<gadget id="calculator">300 / 1_200</gadget>
<output>1/4 = around 0.25</output>

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