If boys account for 3/5 of the whole class in Grade 6, then how many girls account for the whole class?
六年级一班男生占全班人数的(3/5)，则女生占全班人数的多少．
<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>