Uncle Wang's grain output reached 28 tons this year, 3 tons more than last year. What percentage increase in production this year compared to last year?
王大伯家今年粮食产量达到28吨，比去年增产3吨．今年比去年增产百分之几？
<gadget id="calculator">28 - 3</gadget>
<output>25</output>

<gadget id="calculator">3 / 25</gadget>
<output>3/25 = around 0.12</output>

<result>3/25 = around 0.12</result>