-2.35% is the change from 85 to 83
Calculation steps:
[( 83 - 85 ) ÷ 85] x 100 = -2.35%
Formula
Percentage change = [(83 - 85) / 85] x 100
Subtract the new number by the original number
83 - 85 = -2
-2 ÷ 85 = -0.023529411764705882
-0.023529411764705882 x 100 = -2.35%