The ratio of number A to number B is 5:8, how much more number B is than number A.
甲数和乙数的比是5：8，乙数比甲数多多少．
<gadget id="calculator">8 - 5</gadget>
<output>3</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>