1. Four fifths of the total length of a road has been built, and what percentage of the road has not been built? 2. The Yellow river steamer sails from port a to port B. the journey between the two ports is 120 kilometers. The distance that has been sailed is one fifth of the remaining distance. How many kilometers is this freighter away from port B 3. The kilogram of an orange is 2 / 3 of that of an apple, and that of a banana is 1 / 2 of that of an orange

1. Quarter
2. The distance sailed is x, the distance not sailed is 5x, x + 5x = 120, x = 20, so it is still 100 meters away from port B
3. Orange = 2 / 3 apple, banana = 1 / 2 orange, banana = 2 / 3 * 1 / 2 Apple = 1 / 3 apple

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