A toy farm set contains the plastic animals given in the table below.

Animal Number of Animals
Cows 9
Horses 16
Pigs 15
Sheep 8
Chickens 12

The ratio of cows to pigs can be expressed as 3:.

The ratio of horses to chickens can be expressed as :3.

The ratio of sheep to the total number of animals can be expressed as 2:

3.