In the US, 37% of household have dogs, 30% of households have cats, and 7% of households have both cats and dogs. What percentage of US households have a cat or a dog ?

60% of US households have a cat or a dog

Step-by-step explanation:

We solve this problem building the Venn's diagram of these percentage.

I am going to say that:

A is the percentage of houses which have dogs.

B is the percentage of houses which have cats.

We have that:

In which a is the percentage of houses which have dogs but not cats and is the percentage of houses which have both dogs and cats.

By the same logic, we have that:

7% of households have both cats and dogs.

This means that

30% of households have cats

This means that

37% of household have dogs

This means that

What percentage of US households have a cat or a dog ?

60% of US households have a cat or a dog

answer: 177/8

step-by-step explanation: