22 divided by 15 equals 1.466666666666 and the 6 is repeating but they don't have the symbol for that. It would be a line over the first 6. You would round to get the answer. 1.467 or if they want it to the hundrenths place 1.47.
Noreen made 8 and 2/3 cups which after solving becomes 8.666 now the guest ate 3/4 which means 3/4 of 8.66 which is 6.50 which means the guest ate 6 1/2 cups