Question

At a pet store, the ratio of cats to dogs is 7:3, and the ratio of birds to dogs is 5:6. If the pet store only has birds, cats, and dogs, then birds represent what percent of all animals at the store? Mm 16.67% mm 20% mm 22.5% mm 25% mm 28.33%

Answer 1

Answer: The answer is 20%.

Step-by-step explanation: Given that there is a pet store, where

the ratio of cats to dogs is 7 : 3 and ration of birds to dogs is 5 : 6.

Let, 'C', 'D' and 'B' represents the number of cats, dogs and birds respectively.

Then, C : D = 7 : 3 and B : D = 5 : 6.

So, C : D : B = 14 : 6 : 5.

therefore, the percentage of birds in all animals at the pet store is given by

$P_b=\dfrac{5}{14+6+5}\times 100\%=\dfrac{5}{25}\times 100\%=\dfrac{100}{5}\%=20\%.$

Thus, the required percentage is 20%.