The number of girls in class 61 is 75% of the number of boys, and the number of girls is much smaller than the number of boys.
六1班女生人数是男生人数的75%，女生人数比男生人数少多少．
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

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

<result>1/4 = around 0.25</result>