Calculating damage reduction from Armor

[DisRuptive1]

What's the calculation to figure out how much damage is reduced from a given amount of armor or vice versa (how much armor you need to get to a specific damage reduction percentage)?

[Fridmarr]

The formula, assuming the wiki is still accurate, is

DR% = Armor / (Armor + (467.5 * AttackerLevel - 22167.5))

[DisRuptive1]

Drats, I forgot about Wiki. I checked the stickies in the Basic Training, Advanced Training, and Gear Discussion Forums and couldn't find it.

Anyways, thank you.