To determine how many 2/3 cups are in 1 cup, you need to divide 1 cup by 2/3 cup.
Dividing 1 by 2/3 can be done by multiplying 1 by the reciprocal of 2/3, which is 3/2:
1 cup ÷ (2/3 cup) = 1 cup × (3/2) = 3/2 cups.
Therefore, there are 1 and a half (1 1/2) 2/3 cups in 1 cup.