The machine tool factory originally planned to produce 250 machine tools in April. As a result, 45 machines were produced in the first 5 days. According to this efficiency, how many percent can the overproduction be in April?
机床厂原计划四月份生产机床250台，结果前5天就生产了45台，按这样的效率，四月份全月可超产百分之几？
<gadget id="calculator">45 / 5</gadget>
<output>9</output>

<gadget id="calculator">9 * 30</gadget>
<output>270</output>

<gadget id="calculator">270 - 250</gadget>
<output>20</output>

<gadget id="calculator">20 / 250</gadget>
<output>2/25 = around 0.08</output>

<result>2/25 = around 0.08</result>