He should use 1 1/3 cup of sugar to bake 24 cookies.
24/36 can be simplified into 2/3
Multiply 2/3 to 2 cups to get its corresponding measurement used to bake 24 cookies.
Steps in multiplication: 2/3 * 2/1
Step 1. Multiply the numerators
2 * 2 = 4
Step 2. Multiply the denominators
3 * 1 = 3
Step 3. Simplify the fractions.
4/3 = 1 1/3