Answer:
53% probability that a person owns a cat or a dog.
Step-by-step explanation:
I am going to solve this question building the Venn's diagram of these probabilities,
We have that:
P(A) is the probability that a person owns a dog.
P(B) is the probability that a person owns a cat.
8% of the population owned both a cat and a dog
This means that 
22% owned cats
This means that 
39% of the population owned dogs
This means that 
Find the probability that a person owns a cat or a dog.
This is
, which is given by:

So

53% probability that a person owns a cat or a dog.