There are more boys than girls in a class (1/12), how many girls account for the whole class.
某班男生比女生多(1/12)，女生占全班人数的多少．
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 + (1/12) + 1</gadget>
<output>25/12 = around 2.083333</output>

<gadget id="calculator">1 / (25/12)</gadget>
<output>12/25 = around 0.48</output>

<result>12/25 = around 0.48</result>