There are 10 boys and 15 girls in the school writing group, how many boys account for the whole group
学校写作小组有男生10人，女生15人，男生占全组人数的多少
<gadget id="calculator">10 + 15</gadget>
<output>25</output>

<gadget id="calculator">10 / 25</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>