Question

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The ratio of North American Butterflies to South American butterflies at a butterfly park is 7:4. The ratio of
South American butterflies to European butterflies is 4:2. There are 56 North American butterflies at the
butterfly park

How many European butterflies are there?

Answer 1

European butterflies = 16

Explanation:

Let

North American butterflies = 7x

South American butterflies = 4x

European butterflies = 2x

Given that:

NA butterflies =56

`\therefore \: 7x = 56 \\ \therefore \: x = (56)/(7) \\ \therefore \: x = 8 \\ European \: butterflies \\ = 2 * 8 \\ = 16`