Answer:
18 South American butterflies
12 European butterflies
Explanation:
North American : South American : European
5 : 3 : 2
The ratio is 5:3:2.
There are 30 North American butterflies. 30 is 6 × 5, so we need to multiply all numbers in the ratio by 6.
5:3:2 is the same as 30:18:12
Answer:
18 South American butterflies
12 European butterflies