The number of boys in the sixth grade is the number of girls (7/8), so how much is the number of boys in the whole grade?
六年级的男生人数是女生人数的(7/8)，那么男生人数占全年级人数的多少．
<gadget id="calculator">7 + 8</gadget>
<output>15</output>

<gadget id="calculator">7 / 15</gadget>
<output>7/15 = around 0.466667</output>

<result>7/15 = around 0.466667</result>