There are 16 boys and 15 girls, how many girls account for the total number of people?
男生16人，女生15人，女生人数占总人数的多少．
<gadget id="calculator">16 + 15</gadget>
<output>31</output>

<gadget id="calculator">15 / 31</gadget>
<output>15/31 = around 0.483871</output>

<result>15/31 = around 0.483871</result>