The ratio of north american butterflies to south american butterflies at a butterfly park is 5: 3. the ratio of south american butterflies to european butterflies is 3: 2. there are 30 north american butterflies at the butterfly park. how many european butterflies are there?

There are 12 European butterflies.

Step-by-step explanation:

Let be "s" the number of South American butterflies at the butterfly park.

Since the ratio of North American butterflies to South American butterflies at a butterfly park is 5:3 and the number of North American butterflies at the butterfly park is 30, you can write the folllowing proportion:

Solving for "s", you get:

Let be "e" the number of European butterflies at the butterfly park.

Knowing that the ratio of South American butterflies to European butterflies at the butterfly park is 3:2, and since there are 18 South American butterflies, you can write the following proportion:

Solving for "e", you get:

answer: 12

step-by-step explanation:

because yes