Second grade boys account for girls (8/7), so how much more boys than girls?
二年级男生占女生的(8/7)，那么男生比女生多多少．
<gadget id="calculator">8 / 7</gadget>
<output>8/7 = around 1.142857</output>

<gadget id="calculator">(8/7) - 1</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>