The ratio of A and B is 5:4, how much more is A than B?
甲、乙两数的比是5：4，甲数比乙数多多少．
<gadget id="calculator">5 - 4</gadget>
<output>1</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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