There are seven tons of goods in a pile, which are transported in nine times. How many parts of the goods are transported each time? How many tons are transported each time?

There are seven tons of goods in a pile, which are transported in nine times. How many parts of the goods are transported each time? How many tons are transported each time?

On average, 1 / 9 of the goods are transported each time
Average per shipment: 7 △ 9 = 7 / 9 tons

The canteen transported 4 tons of coal and planned to burn it for five months. The amount of coal burned in each month is expressed as a fraction of a few tons and a decimal of () tons;
The average monthly coal consumption is a fraction of one ton, which is a fraction of the four tons

The canteen transported 4 tons of coal and planned to burn it for five months. The amount of coal burned in each month is expressed as 4 / 5 tons in fractions and (0.8) tons in decimals
The average monthly coal consumption is 4 / 5 of a ton, which is 1 / 5 of the 4 tons