A is B's (7/8), that is, how much more B is than A
甲是乙的(7/8)，就是乙比甲多多少
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">1 - (7/8)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/8) / (7/8)</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>