Master Zhang processed 480 parts, 80 more than planned, how many percent more?
张师傅加工了480个零件，比计划多80个，多百分之几？
<gadget id="calculator">480 - 80</gadget>
<output>400</output>

<gadget id="calculator">80 / 400</gadget>
<output>1/5 = around 0.2</output>

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