The number of A is less than the number of B (1/3), and the number of A is the number of B.
甲数比乙数少(1/3)，甲数是乙数的多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>