A factory completed 56% of the planned output in the first half of the month, and 64% of the planned output in the second half of the month. How much is the increase in production this month?
某厂上半月完成计划产量的56%，下半月又完成计划产量的64%，这个月增产多少．
<gadget id="calculator">56 / 100</gadget>
<output>14/25 = around 0.56</output>

<gadget id="calculator">64 / 100</gadget>
<output>16/25 = around 0.64</output>

<gadget id="calculator">(16/25) - 1</gadget>
<output>-9/25 = around -0.36</output>

<gadget id="calculator">(14/25) + (-9/25)</gadget>
<output>1/5 = around 0.2</output>

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