The ratio of number A to number B is 5:8, how much less number A is than number B.
甲数和乙数的比是5：8，甲数比乙数少多少．
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 - (5/8)</gadget>
<output>3/8 = around 0.375</output>

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