A bottle of beverage (3/4) liters, grandpa drank (1/12) of this bottle of beverage, mother drank (1/15), and the rest was drunk by Beibei, who drank the bottle of beverage What percentage?
一瓶饮料(3/4)升，爷爷喝了这瓶饮料的(1/12)，妈妈喝了(1/15)，剩下的全由贝贝喝了，贝贝喝了这瓶饮料的几分之几？
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/12) + (1/15)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<result>17/20 = around 0.85</result>