The automobile factory will produce 2,400 vehicles this year, an increase of 400 compared with last year. What percentage is the increase?
汽车厂今年生产汽车2400台，比去年增产400台，增产百分之几？
<gadget id="calculator">2_400 - 400</gadget>
<output>2_000</output>

<gadget id="calculator">400 / 2_000</gadget>
<output>1/5 = around 0.2</output>

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