To find the percentage of people who have pets, you can use the formula:
\[ \text{Percentage} = \left( \frac{\text{Number of people with pets}}{\text{Total number of people}} \right) \times 100 \]
In this case, 13 out of 20 people have pets.
So, the calculation is:
\[ \text{Percentage} = \left( \frac{13}{20} \right) \times 100 = 0.65 \times 100 = 65 \]
Therefore, you would fill in the blanks as follows:
That means 65% of people have pets. I chose 65 because it's the number out of 100.