Diane has 15/16 cup of butter. A recipe for a cake calls for 1/4 cup of butter. Diane was able to make 3 whole cakes.

Amount of butter left = 3/16 cup

Step-by-step explanation:

Given:

Total amount of butter = 15/16

Each cake need butter = 1/4

Total cake = 3

Find:

Amount of butter left

Computation:

Amount of butter left = Total amount of butter - [Each cake need butter][Total cake]

Amount of butter left = 15/16 - [3][1/4]

Amount of butter left = 3/16 cup

the answer to your question a or b but i am pretty sure it is b. i hope this : )

step-by-step explanation:

so, converting firstly the mixed fractions to improper fractions and then "adding".