Generally more stats on your total % increases being made more obvious in the HUD. There should be a way to see the total amount of dps/gold found % increase you receive from your achievements specifically as well. Lets say I have 400% dps increase on Kaine (without achievement % since I don't want to go count them out) when I hover over Kaine I should be able to see that dps %increase total. It should include the achievement bonuses and equips as well.