Question

mrs. Williams uses the following recipe for crispy rice treats. She decided to make 2/3 of the recipe. 2 cups of melted butter, 24 oz marshmallow, 13 cups rice crispy treats.

Answer 1

Multiply the Ingredients by 2/3, 
2 cups of butter times 2/3 is 1.333... or (4/3)
24 oz of Marshmallows would be 16
and 13 cups of rice crispy cereal is 8.6666... or (26/3)

Answer 2

To find how much she needs of every ingredient, multiply every ingredient by 2/3.

Butter: 2•2/3=4/3=1&1/3 cups
Marshmallows: 24•2/3=16 oz
Cereal: 13•2/3= 26/3=8&2/3 cups