To Andrew- re: reviews grading process

This isn't exactly related to Styx, but I just got to know how does one determine what pertentage to give an album..
..I mean if you like a cd and give it, say, an 84% grade, why that and not 83% or 85%?
Seems like pulling numbers out of thin air.
..I mean if you like a cd and give it, say, an 84% grade, why that and not 83% or 85%?
Seems like pulling numbers out of thin air.