a baker used 4 cups of flour to make 5 batches of brownies. he used - of a cup of flour to make 1 batch

1/8 of a cup or 2 tablespoons

4/5th of a cup of flour

Step-by-step explanation:

4 cups flour to 5 batches brownies = x cups flour to 1 batch brownies

4 / 5 = x / 1 ... cross multiply because this is a proportion

(5) (x) = (4) (1)

5x = 4 ... divide both sides by 5

x = 4/5

so he used 4/5 of a cup of flour to make 1 batch of brownies <==