The air-conditioning factory completed the annual planned tasks in the first half of last year (July 11), 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 exceeded the annual planned tasks last year?
空调厂去年上半年完成全年计划任务的(7/11)，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">7 / 11</gadget>
<output>7/11 = around 0.636364</output>

<gadget id="calculator">(7/11) - 1</gadget>
<output>-4/11 = around -0.363636</output>

<gadget id="calculator">(7/11) + (-4/11)</gadget>
<output>3/11 = around 0.272727</output>

<result>3/11 = around 0.272727</result>