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?

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4 May, 00:20

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Villarreal · 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