The ratio of North American butterflies to South American butterflies at a park is 5:3. The ratio of South American butterflies to European butterflies is 3:2. There are 30 North American butterflies

The ratio of North American butterflies to South American butterflies at a 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.