What is the number closest to 1 among (4/5), (5/6), (6/7)
(4/5)、(5/6)、(6/7)中最接近1的数是多少
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<result>6/7 = around 0.857143</result>