The ratio of the number of girls in the sixth grade to the number of boys is 3:5, so how many boys in the sixth grade account for the total number of students in the whole grade?
六年级女生人数与男生人数的比是3：5，那么六年级男生人数占全年级人数的多少．
<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<result>5/8 = around 0.625</result>