When sharing exp is enabled between 2 or more toons the exp is taken from all members of the fellowship online and sharing and gained exp, 1% of the exp is put in a pool, the pool is then divided evenly (as with all eq math)rounded down. It is then applied to the next incoming exp for 1% from pool per kill. So you get main toon out and gimp box that are both in the same fellowship hit ctrl+shift+f and there should be an option for fellowship exp sharing, turn both on. Log box off, load up a grp and exp like normal for a few hours, then log the bot back on, and have him join grp and kill, you will see the toon gets a bonus per kill applied after initial exp gain thats from the fellowship, just keep killing till its gone and rinse and repeat. ingame it says a small fraction, so i take it its either the same amount as your chance for a chase loot to drop or the same chance to find a real gm in game, take your pick lol.