User blog comment:Deshiba/Season 3 Armor and Armor Penetration/@comment-220.255.2.108-20121111094018

I read the first part only(i dun wanna read the calculation part... Too much) about renekton with stuff. Yes the calculations are correct.

However, the % armor pen from last whisperer and mastery is only 46% since its not additive. Its multiplicative.

Secondly, if i never remember wrong, Armor pen does not penetrate below 0... So if the opponent's armor is 0 and you got 100 armor pen, its still calculated as 0 armor, not -100 armor.

Finally, i read about this in some other website instead of the website you offered but, they are nerfing the numbers if this mechanic is implemented. Because if its the same, it will be as strong as what you have calculated. Fortunately(or unforunately, depending on your view), its not.