The garment factory planned to produce a batch of children's clothing this month, but it was completed in the first half of the month (3/5), and the production in the second half of the month was the same as the first half. If overproduction, by what percentage?
服装厂本月计划生产一批童装，结果上半月完成了(3/5)，下半月和上半月产得同样多，超产了吗？如果超产，超产了几分之几？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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