A factory completed (4/9) of the annual planned output value in the first half of last year, and completed (3/5) of the annual planned output value in the second half of last year. Last year, the output value of this factory exceeded the annual planned output value by what percentage?
一个工厂去年上半年完成了全年计划产值的(4/9)，下半年完成了全年计划产值的(3/5)，去年这个工厂的产值超过了全年计划产值的几分之几？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) - 1</gadget>
<output>-2/5 = around -0.4</output>

<gadget id="calculator">(4/9) + (-2/5)</gadget>
<output>2/45 = around 0.044444</output>

<result>2/45 = around 0.044444</result>