Need help concerning Armor...

I don't know if this has been asked before, but if it has sorry.

I was just wondering is it possible to change the amount of "Damage Reduction" percent on a hero for every point of defense or armor you obtain?
i.e. If you have 3 armor your "Damage Reduction" percent would be 2%.

Thank you.

It's in advanced-Gameplay constants. You should find a option there about armor.

Thanks. I found it...