Arrange the four numbers 1, (5/6), (4/7), and (5/7) from large to small, what is the second number.
将1、(5/6)、(4/7)、(5/7)四个数从大到小排列，排在第二个的是多少．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<result>5/6 = around 0.833333</result>