Ranking variables into first, second, third.

Hi all,

I have a story with 20 variables that are automatically increased as users select "likes". How do I assign the top 3 values to first, second, third so I can display the names on the next slide? The 20 variables are values. 

For example:

TOP 3 are:

 camping 22

 biking 20

 fishing 19

Thank you.

Rick