I hope this is the right forum for this thread. If not please excuse my fault and remove to where it belongs.
I was very curios of how the new Armor Penetration Rating works and how the static numbers effect the percentage values. I couldn't find any data like this on the web, so i created this little spreadsheet and liked what came out afterwards.
You can change values of the armor which the attacked target has, choose different static Armor Debuff amounts, the attacker level and the percentage of Armor beeing ignored.