The number of people in one group is (3/4) the number of people in the second group, and the number of people in the second group is more than that of the first group ((())/(())).
一组人数是二组人数的(3/4)，二组人数比一组人数多((())/(()))．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) / (3/4)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>