Answer:
ounces
Explanation:
Since Ethan needs
ounces of blue paint to make 1 batch of green paint, we can multiply the amount of blue paint needed by 5 to see how much blue paint he'll need for 5 batches of green paint.
![(2 (3)/(8))5 = 10 (15)/(8) \rightarrow \boxed{11(7)/(8)}](https://img.qammunity.org/2023/formulas/mathematics/college/423eahn03s6v3bkv9ayn0iqnzs4goxg69c.png)
This means he will need
ounces of blue paint to make 5 batches of green paint.