The sum of A and B is (7/8), A's number is (1/6), what is B's number?
甲、乙两数和是(7/8)，甲数是(1/6)，乙数是多少？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(7/8) - (1/6)</gadget>
<output>17/24 = around 0.708333</output>

<result>17/24 = around 0.708333</result>