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.

A. How many South American butterflies are there?

B. How many European butterflies are there?

Question

Tatiana Luna

17 January, 11:55

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Answers (1)

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Dominique Lang · Answer 1

30/5 is 6

to keep the proportion, 5:3 becomes 30:18

18/3 is 6

to keep the proportion, 3:2 becomes 18:12

a. 18

b. 12