The number of girls in class 5 and 2 accounts for 3/5 of the whole class, and the number of boys accounts for how much of the whole class.
五2班的女生人数占全班人数的(3/5)，男生人数占全班人数的多少．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>