To find the percentages of people that prefer dogs, cats or birds, divide the corresponding amount of people that likes each pet by the total amount of people in the survey, and then multiply that quantity by 100.
Since there are 11 participants, we should divide each quantity by 11.
Dogs:
There are 5 people who prefer dogs. The percentage is:
[tex]\frac{5}{11}\times100\text{ \%}=45.4545\ldots\text{ \%}[/tex]Cats:
There are 4 people who prefer cats. The percentage is:
[tex]\frac{4}{11}\times100\text{ \%=36.3636}\ldots\text{ \%}[/tex]Birds:
There are 3 people who prefer birds. The percentage is:
[tex]\frac{3}{11}\times100\text{ \%=27.2727}\ldots\text{ \%}[/tex]