Answer:
0.8 cup.
Explanation:
We have been given that a baker used 4 cups of flour to make 5 batches of brownies. We are asked to find the number of cups of flour needed to make 1 batch of brownies.
We will divide 4 by 5 to find number of cups of flour needed to make 1 batch of brownies.

Therefore, 0.8 cup of flour needed to make one batch of brownies.