The TV factory organizes workers to travel. Those who travel to Beijing account for 1/3 of the total number of workers, those who travel to Hainan account for 1/4 of the total number of workers, and the rest travel to Qingdao. How much?
电视机厂组织工人旅游，去北京旅游的占总人数的(1/3)，去海南旅游的占总人数的(1/4)，剩下的去青岛旅游，去青岛旅游占总人数的几分之几？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/3) + (1/4)</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">1 - (7/12)</gadget>
<output>5/12 = around 0.416667</output>

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