The TV factory produced 500 TV sets last year and 600 TV sets this year. What percentage is the increase in production this year compared to last year?
电视机厂去年生产电视机500台，今年生产600台，今年比去年增产百分之几？
<gadget id="calculator">600 - 500</gadget>
<output>100</output>

<gadget id="calculator">100 / 500</gadget>
<output>1/5 = around 0.2</output>

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