A bottle of beverage (1/2) liter, father drank (1/4) of this bottle of beverage, mother drank (1/6) of this bottle of beverage, the rest Jingjing drank all, Jingjing drank this What fraction of a bottle of drink?
一瓶饮料(1/2)升，爸爸喝了这瓶饮料的(1/4)，妈妈喝了这瓶饮料的(1/6)，剩下的晶晶全喝了，晶晶喝了这瓶饮料的几分之几？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

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

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