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

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So the ratio is 5:3:2.

So 30 North american: 18 South american, and : 12 European. Hope it helps!
Son1ca
(Key - North American Butterfly: South American/Europen Butterfly.
150:90 (Na to Sa)
90:60 (Na to Eu)