A is less than B (1/8), then the number of A is the number of B ((())/(())).
甲比乙少(1/8)，则甲数是乙数的((())/(()))．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 - (1/8)</gadget>
<output>7/8 = around 0.875</output>

<result>7/8 = around 0.875</result>