The tractor factory produces 2,400 tractors this year, 400 more than last year, and what percentage is more produced this year than last year?
拖拉机厂今年生产拖拉机2400台，比去年多生产400台，今年比去年多生产百分之几？
<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>