If there are fewer girls than boys (3/7), what fraction of the number of girls is equal to the number of boys?
如果女生人数比男生少(3/7)，那么女生人数相当于男生人数的几分之几？
<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>