A bread recipe calls for 1313 cup of butter. You want to make 1212 of a batch.

How much butter do you need?

What are those numbers?

I suppose it should be 1/3and 1/2?

To determine the amount of butter needed for a batch that is 1/2 of the original recipe, you can use the following steps:

1. Determine the ratio between the original batch size and the desired batch size: 1/2 is equal to 12/24 or 1:2.

2. Apply the same ratio to the amount of butter required in the original recipe: 1313 cups of butter.

Multiply the amount of butter by the ratio (1:2):
1313 cups * 1/2 = 1313 * 1/2 = 1313/2 = 66/2 = 66/2 = 6.6 cups.

Therefore, you will need 6.6 cups of butter to make a batch that is 1/2 of the original recipe.