The number of girls in class one of the fourth grade is 3/7 of the whole class, and what fraction is the number of boys?
四年级一班的女生人数是全班人数的(3/7)，男生人数是全班人数的几分之几？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">1 - (3/7)</gadget>
<output>4/7 = around 0.571429</output>

<result>4/7 = around 0.571429</result>