There are 3 tons of coal in a pile, which is burned out in 20 days. How many tons of coal is burned every day on average? What percentage of the coal is burned every day on average?

There are 3 tons of coal in a pile, which will be burned out in 20 days, with an average of 3 / 20 tons per day, and an average of 1 / 20 of this pile of coal per day

There is a pile of coal in the factory. After 23 tons of coal are burned, 25 tons are left. How many parts are left? How many tons of coal is there in this pile?

1-23 = 13; 25 △ 13 = 65 (tons). A: there are 13 left, and there are 65 tons of coal in this pile

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