The air-conditioning factory completed the annual planned tasks in the first half of last year (9/16), and completed the same amount in the second half and the first half of the year. What percentage of the annual air-conditioning factories actually overfulfilled the annual planned tasks last year?
空调厂去年上半年完成全年计划任务的(9/16)，下半年和上半年完成的同样多，空调厂去年实际超额完成全年计划任务的几分之几？
<gadget id="calculator">9 / 16</gadget>
<output>9/16 = around 0.5625</output>

<gadget id="calculator">(9/16) - 1</gadget>
<output>-7/16 = around -0.4375</output>

<gadget id="calculator">(9/16) + (-7/16)</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>