The machine tool factory produced 800 machine tools last year, and this year it produced 300 more than last year. What percentage is the increase in production this year compared to last year? Column: how much.
机床厂去年生产机床800台，今年比去年多生产300台，今年比去年增产百分之几？列式：多少．
<gadget id="calculator">300 / 800</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>