A factory produces a batch of parts, and the first half of the month is completed (5/6), and the second half of the month is completed (2/3). By what percentage is the actual overproduction?
某工厂生产一批零件，上半月完成(5/6)，下半月完成(2/3)，实际超产几分之几？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) - 1</gadget>
<output>-1/3 = around -0.333333</output>

<gadget id="calculator">(5/6) + (-1/3)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>