A certain factory produced 4,400 machines in June, which was 400 more than planned. What percentage was the excess?
某厂6月份生产机器4400台，比计划超过400台，超额了百分之几？
<gadget id="calculator">4_400 - 400</gadget>
<output>4_000</output>

<gadget id="calculator">400 / 4_000</gadget>
<output>1/10 = around 0.1</output>

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