The height ratio between Xiaohong and her father is 3:4, how much is Xiaohong shorter than her father?
小红和爸爸身高的比是3：4，小红比爸爸矮多少．
<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>

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