The ratio given says this - 3 puppies : 2 adults = 5 total dogs
You are given (?) puppies : (?) adults = 80 total dogs
In this case, you are trying to find the number of puppies, so you do not need to care about the number of adults. You need to compare the ratio with the actual amount.
Total/puppies = total/puppies
5/3 = 80/(?)
Now, cross multiply.
5(?) = 240
Divide both sides by 5 and you get your answer.
(?) = 48
The perimeter is 7500 yd because u multiple 50 by 300 to get 15,000 then divide that by 2 to get 7,500
Answer:
11/12. This is because 2/3 is equal to 8/12. 11/12 is clearly bigger than 8/12.
Edit: Bottom left is correct.