So,
390 people out of a total of 500 people used the internet in order to buy a pet. You can put this in fraction form:
[tex] \frac{390}{500} [/tex]
Simplify
[tex] \frac{390}{500} = \frac{2* 3 *5*13}{2*2*5*5*5} = \frac{3*13}{2*5*5}[/tex]
or
[tex] \frac{39}{50} [/tex]