Question

By the end of the day, the coffee urn, which had started out with 9 7/8 gallons of coffee, was left with 1 1/8 gallons. How many gallons of coffee had been dispensed? Write your answer as a fraction or as a whole or mixed number.

Answer 1

`8(3)/(4)` galloons of coffee had been dispensed.

Explanation:

Quantity of coffee in starting
`=9(7)/(8)=(79)/(8)` galloons

Left coffee
`=1(1)/(8)=(9)/(8)`

Dispensed coffee,

`=(79)/(8)-(9)/(8)\\\\=(79-9)/(8)\\\\=(70)/(8)\\\\=(35)/(4)\\\\=8(3)/(4)`

Hence,
`8(3)/(4)` galloons of coffee had been dispensed.