Answer:
You can feed 18 butterflies with 45 drops of nectar.
Explanation:
5 drops of nectar = 2 fed butterflies.
First, find out how many groups of 5 are in 45. Then, multiply that by 2 to find out how many butterflies that feeds.
So basically, do:
(45 ÷ 5) × 2 = 9 × 2 = 18
Hope this helps :)