-90.86% is the change from 930 to 85
Calculation steps:
[( 85 - 930 ) ÷ 930] x 100 = -90.86%
Formula
Percentage change = [(85 - 930) / 930] x 100
Subtract the new number by the original number
85 - 930 = -845
-845 ÷ 930 = -0.9086021505376344
-0.9086021505376344 x 100 = -90.86%