Talk:Armor penetration/@comment-24248596-20160207153831

Okay, so lemme see if I understand this right

So let's say I'm play Darius with full armor pen reds and quints ( 19 flat armor pen )

My Apprehend is fully levelled ( 25% armor pen )

I have taken precision ( 30 armor pen at lvl 30 )

And I have built The Black Cleaver ( 30% armor REDUCTION at when fully stacked )

So, with all of these requirements (assuming I've hit a champion enough times to fully stack TBC's passive) my next attack against a champion with 200 armor will deal damage as if they had 56 armor instead? This is incredibly situational, but I just want to make sure I understand the math right here...