If the ratio of male to female students is 5:6, the number of female students is less than that of the whole class ((())/(())).
男女生人数比为5：6，则女生比全班人数少((())/(()))．
<gadget id="calculator">5 + 6</gadget>
<output>11</output>

<gadget id="calculator">5 / 11</gadget>
<output>5/11 = around 0.454545</output>

<result>5/11 = around 0.454545</result>