Talk:The Black Cleaver/@comment-108.18.96.222-20121205105549/@comment-5756858-20121205160302

Not quite.

The difference probably isnt hat big, but its there.

%-pen, like flatpen, is on you. It's applied on yourself, allowing to bypass armor.

Reduction however, both flat and %, is applied on the enemy, also allowing your teammate  to deal more damage.

Also, % reduction stacks multiplicatively. Unless I'm making a grave mistake, this means you actually get 51%  armor reduction