The production of wine will be divided into a 50% given by X and Y, a 20% given by W and V, and a 30% given by Z
Each percentage contains one or two kinds that make it up. I am unsure whether the usage of divided into and given by sounds weird or not. I am not even sure whether putting a before the percentage is fine. Bullet lists are not an option, but radically restructuring the sentence is fine.