plz DE plz maths plz (heavy caliber)

[Surenakitten]

soooo im a bit confused and pretty certain theirs been a mathing mistake >.>

my heavy caliber is 8/10 stars putting it at +135% damage and -45% accuracy and well not certain how its getting its numbers for example the Baza has a base accuracy of 80, so if im doing my maths for heavy caliber should be 0.45X80=36 80-36=44 so the Baza should be at 44 accuracy and yet  the Baza drops to 27.2 witch far exceeds 45% of 80 o.O