In a mathematics final, all preliminaries won prizes. First prizes account for 1/6 of the total, second prizes account for 1/4 of the total, and the rest win third prizes. What percentage of the total are third prizes?
在一次数学决赛中，所有预赛者都获了奖．获一等奖的占总数的(1/6)，获二等奖的占总数的(1/4)，其余的获三等奖，获三等将的占总数的几分之几？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

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

<gadget id="calculator">1 - (1/6) - (1/4)</gadget>
<output>7/12 = around 0.583333</output>

<result>7/12 = around 0.583333</result>