The cement plant planned to produce 400,000 tons of cement last year, but actually produced 80,000 tons more. What percentage increase?
水泥厂去年计划生产水泥40万吨，实际多生产了8万吨，增产了百分之几？
<gadget id="calculator">8 / 40</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>