Problema Solution

The pet store has 36 birds, 1/3 of which are parakeets and the remaining 2/3 are finches. If the store wanted to have 40% of its birds to be parakeets (without reducing the number of finches) how many parakeets would they need to buy?

Answer provided by our tutors

(1/3) of 36 is 36/3 = 12 parakeets

36 - 12 = 24 finches

Let 'x' represent the number of parakeets that the store needs to buy in order to have 40% of its birds to be parakeets. Then the total number of birds will be '36 + x'.

Now, we can write the following equation:

(36 + x)*0.40 = 12 + x

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Click here to see the step by step solution for x

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x = 4 parakeets

The store needs to by 4 parakeets.