The distance of the waterway between A and B is 480 kilometers, and the captain of a ship is 40 years old. The ship departs from City A to City B at 9:00 in the morning, and travels 80 kilometers per hour. After 5 hours, it is still 80 kilometers away from City B. How much of the journey has been completed?
甲、乙两城水路航线路程是480千米，一艘轮船的船长是40岁．这艘轮船上午9：00从甲城出发开往乙城，每小时行80千米，行了5小时后，距离乙城还有80千米的路程，已经航行了全程的几分之几？
<gadget id="calculator">5 / 480</gadget>
<output>1/96 = around 0.010417</output>

<gadget id="calculator">80 * (1/96)</gadget>
<output>5/6 = around 0.833333</output>

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