Lilou Township planned to produce 250 tons of coal in December, but actually produced 275 tons of coal. What percentage increase?
李楼乡12月份计划产煤250吨，实际产煤275吨，增产了百分之几？
<gadget id="calculator">275 - 250</gadget>
<output>25</output>

<gadget id="calculator">25 / 250</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>