The machine tool factory planned to produce 500 locomotives last year, but actually produced 550 locomotives. How many percent exceeded the plan?
机床厂去年计划生产机车500台，实际生产550台，超过计划百分之几？
<gadget id="calculator">550 - 500</gadget>
<output>50</output>

<gadget id="calculator">50 / 500</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>