The ratio for each animal between the stores is the divition of pet store with Irby Pets so:
For cats is going to be:
[tex]\frac{8}{2}=4[/tex]So the ratio is 4:1
for dogs is going to be:
[tex]\frac{12}{3}=4[/tex]So the ratio is again 4:1
So the total ratio will be 4:1