There are 15 boys and 25 girls in the school composition group. How many boys account for the whole group?
学校作文小组有男生15人，女生25人，男生占全组人数的多少
<gadget id="calculator">15 + 25</gadget>
<output>40</output>

<gadget id="calculator">15 / 40</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>