thank you very much for your help. This helped me a lot for the beginning.
What I'm trying now is to calculate the same formula with a more complex database where I have more variables/columns.
In this next step I would like to calculate the growth rate per country. Therefore I added a country-column to the attached database in the original question. With the curly brackets I'm unfortunately not able to get the growth rate by country.
Do you know if there is an option to calculate this by country then, to be able to just filter out the country of interest?
Thank you very much in advance.