Ok slight Clarification to percentages of Race/Culture of Ichigo. (i know you all are actually summing up the powers he has, just figured id help correct the mathematics a bit... I see a bunch of people, though how little it really matters argue over how one can be "half" of 3 or 4 things at once. Wait that makes 2???!! lol)
Hollow and Fullbring is not an actual race, culture, breed, etc. Hollow and Fullbring are results of conversion of Human, Shinigami and Quincy, which are the 3 only races of being in Ichigo's case. He was not born a Hollow so he doesn't have Hollow Genetics, he developed it when his Chain of life was severed from his chest gaining his OWN Shinigami powers.
-1 - Hollow's are what everything that isnt Ascended turns into. Hollows do not Breed, but instead devour, merge and kill one another.
+/-1 - Fullbring is a power ability, those who have stronger than normal reiatsu's than a normal human can gain inner abilities. (This is a Power nothing more)
+1 - Quincy is a Race of Beings that were once members of soul society. Its like Democrats and Republicans, or Catholics and Jewish Folk. they live in the same house, but have different points of views on the same beliefs. They do have their own powers.
+1 - Shinigami are the the ones with the strong reiatsu of all members of the Soul Society.
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As of this point with what seems to be happening, Ichigo is no longer considered Human at all. He is HALF Shinigami and Quincy as far as Race goes. As for his powers, they just stack up, on top of what he already has. Half Shinigami and Quincy powers to start. Gaining and losing his Fullbring Powers (really didn't do anything for him anyways), and Gaining his Hollow Abilities which is actually a booster if you think about it. So his overall power is 150% or 3 powers to his 2 race backgrounds.