Let's say I have a table that contains aggregated avg iPhone prices:
Avg price iPhone 4
Avg price iPhone 5
Now I would like to compare iPhone 5 avg prices vs iPhone 4. In excel I would simply divide "iPhone 5_UK" by "iPhone 4_UK" and correspondingly "iPhone 5_US" by "iPhone 4_US" but how do I do it in tableau. Let's say creating four hardcoded parameters is not an option and I want to do it automatically.