Number A is number B (7/9), how much more number B is than number A
甲数是乙数的(7/9)，乙数比甲数多多少
<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">1 - (7/9)</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">(2/9) / (7/9)</gadget>
<output>2/7 = around 0.285714</output>

<result>2/7 = around 0.285714</result>