If a baker doubles a recipe that calls for 6-⅔ cups of flour, how many cups will be needed in total?

To find how many cups of flour are needed if the recipe is doubled, you start with the original amount of flour - 6 and 2/3 cups.

First, convert 6 and 2/3 into an improper fraction. 6 can be expressed as 18/3, so when you add the 2/3, it becomes 18/3 + 2/3 = 20/3 cups.

Next, to double this amount, multiply by 2:

(20/3) × 2 = 40/3 cups.

Now, convert 40/3 back into a mixed number. Dividing 40 by 3 gives 13 with a remainder of 1, or 13 and 1/3.

Thus, when the baker doubles the recipe that calls for 6 and 2/3 cups of flour, the total amount needed would be 13 and 1/3 cups.