A recipe for crumb cake says to mix 3/8 cup of brown sugar and 1/3 cup of white sugar. From this sugar mixture, set aside 1/4 cup for the crumb topping. The remaining sugar mixture is used to make the cake. What amount of the sugar mixture is used to make the cake?

A. 17/24 cupB. 1/2 cupC. 11/24 cupD. 7/12 cup

C. 11/24

Step-by-step explanation:

First let's add the sugars:

3/8 + 1/3 = ?

We need a common denominator! Multiply 3/8 by 3 and 1/3 by 8.

9/24 + 8/24 = ?

= 17/24

Okay, so far we have 17/24 cup of sugar. Now subtract the crumb topping.

17/24 - 1/4 = ?

Looks like we need another common denominator- - multiply 1/4 by 6.

17/24 - 6/24 = 11/24

The answer is C. 11/24.