how the hell you get that? its 25%, + 10%? either 25% * 110% which is 27.5 or 25% + 10% which is 35%...
The buff isn't "25%". It's a multiplier of 1.25. Multiply that by a further multiplier of 1.1, and you get 1.25*1.1=1.375
Rather simple maths, my dear Crazy.
Also, the RGDs told me so, unless there's been a ninja change since I last spammed the bloody things.