Damage reduction — how does it work?

The formula is right. For more information, take a look at DR Formula.

There's a post on reddit about it now.

100 DR = 50% reduction in damage i.e. double your effective hit points

200 DR = 66.6% reduction in damage i.e. triple your effective hit points

300 DR = 75% reduction in damage i.e. quadruple your effective hit points.


This corrects the flawed mechanics in ME3 where you could be invulnerable if you had 140% DR, something that the batguard, kroguard could achieve quite easily and was in reach of the krentinel, justicar and a few others. (Why 140%? Because reasons. If you want a full explanation come find me in 2013.)