The number of boys in the sixth grade is (3/4) of the number of girls, so the number of boys accounts for ((())/(())) of the whole grade.
六年级的男生人数是女生的人数的(3/4)，那么男生人数占全年级人数的((())/(()))．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 + (3/4)</gadget>
<output>7/4 = around 1.75</output>

<gadget id="calculator">(3/4) / (7/4)</gadget>
<output>3/7 = around 0.428571</output>

<result>3/7 = around 0.428571</result>