To solve this problem you must apply the proccedure shown below:
1- You have the following information given in the problem above:
- The jug helds 16 cups of milk.
- Isaac drank 1 7/8 cups and his brother drank 1 1/2 cups.
2- Keeping this on mind, you have:
1 7/8=15/8
1 1/2=3/2
=16 cups-15/8 cups-3/2 cups
=101/8 cups
The answer is: 101/8 cups