The TV factory completed the annual plan (9/13) in the first half of last year, and completed the same amount in the second half and the first half. What percentage of the annual plan did the TV factory actually overfulfill last year?
电视机厂去年上半年完成全年计划的(9/13)，下半年和上半年完成的同样多．电视机厂去年实际超额完成全年计划的几分之几？
<gadget id="calculator">9 / 13</gadget>
<output>9/13 = around 0.692308</output>

<gadget id="calculator">(9/13) - 1</gadget>
<output>-4/13 = around -0.307692</output>

<gadget id="calculator">(9/13) + (-4/13)</gadget>
<output>5/13 = around 0.384615</output>

<result>5/13 = around 0.384615</result>