If the number of boys in a class is (2/5) the number of girls, then the number of girls is ((())/(())) and the number of boys is ((())/(())) ), how much fewer boys than girls.
某班男生人数是女生人数的(2/5)，则女生人数是男生人数的((())/(()))，男生人数是全班人数的((())/(()))，男生人数比女生少多少．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>