Answer: 78/10 gallons of coffee has been consumed
Explanation:
The total amount of coffee that was in the coffee pot is 9 1/10 gallon of coffee. Let us convert to improper fraction. It becomes 91/10 gallons of coffee.
By the end of the day, the coffee pot was left with 1 3/10 gallons of coffee. Let us convert it to improper fraction. It becomes 13/10 gallons of coffee. The total gallons of coffee that has been consumed is
Total amount of coffee that was in the coffee pot - the amount of coffee left in the coffee pot. It becomes
91/10/- 13/10 = 78/10 gallons