To determine how many 2/3 cups are in 3 cups, we need to divide the total amount of 3 cups by the value of 2/3 cup.
To divide fractions, we invert the second fraction and multiply.
3 cups divided by 2/3 cup can be written as: 3 cups * (3/2 cups).
Now, let's calculate: 3 * (3/2) = 9/2 = 4.5.
Therefore, there are 4.5 (or 4 and 1/2) 2/3 cups in 3 cups.