The ratio of A and B is 5:8, how much more is B than A.
甲、乙两数的比是5：8，乙比甲多多少．
<gadget id="calculator">8 - 5</gadget>
<output>3</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>