factory originally planned to produce 150 machine tools in March, but actually completed 82 machines in the first half of the month, and 86 machines in the second half of the month. What percentage of the excess was completed this month?
某工厂原计划3月份生产150台机床，实际上半月完成82台，下半月完成86台，这个月超额完成百分之几？
<gadget id="calculator">86 - 150</gadget>
<output>-64</output>

<gadget id="calculator">82 + (-64)</gadget>
<output>18</output>

<gadget id="calculator">18 / 150</gadget>
<output>3/25 = around 0.12</output>

<result>3/25 = around 0.12</result>