Horizontal Bar calculation string

Hello,

i have the following question: I have a string field and i want to count it and then divide it by the sum and calculate *100 at the end. Theoretically I want to find out what percentage of each application uses and this should be displayed in the horizontal bar.
The formula:
Count string field / sum of all fields * 100

Unfortunately I have not found this. Thanks in advance for the help.

Currently I have created this visualization:

Hi @Anton91. We have a great blog post about this. Please let me know if you still have any questions.