jarudman

10% is a good guess, most people underestimate so by their standards it could be 8%, but realistically I would say 10% or just under

I'm eating over 4000 a day and only gain around 250 grams a week XD

Focus on a big breakfast and drinking liquids to stretch out your stomach

I'm gaining at the moment, 6"5ft and only 170lbs earlier this year -_- (196cm and 73kg)

Take up a starting strength programme, (Jason Blahas 5x5) Eat enough, sleep and drink water. You can go up quite a few pounds without any real fat if you train hard, don't hide from the work.