certain workshop of the factory produced 2,600 machine parts last month, which was 100 more than the original plan. What percentage was the overproduction?
工厂某车间上月生产机器零件2600个，比原计划超产100个，超产了百分之几？
<gadget id="calculator">2_600 - 100</gadget>
<output>2_500</output>

<gadget id="calculator">100 / 2_500</gadget>
<output>1/25 = around 0.04</output>

<result>1/25 = around 0.04</result>