A day and night have passed (5/6), and the remaining time is less than the past time. How many
一昼夜已经过去了(5/6)，余下的时间比过去的时间少．多少
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 - (5/6)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(5/6) - (1/6)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) / (5/6)</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>