Two masters and apprentices make parts, the master completes (3/4) of the task, and the apprentice completes (2/3) the task, how much is the master and apprentice overfulfilled?
师徒两人制造零件，其中师傅完成了任务的(3/4)，徒弟完成任务的(2/3)，师徒两人共超额完成了几分之几？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</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">(3/4) + (-1/3)</gadget>
<output>5/12 = around 0.416667</output>

<result>5/12 = around 0.416667</result>