-90.34% is the change from 880 to 85
Calculation steps:
[( 85 - 880 ) ÷ 880] x 100 = -90.34%
Formula
Percentage change = [(85 - 880) / 880] x 100
Subtract the new number by the original number
85 - 880 = -795
-795 ÷ 880 = -0.9034090909090909
-0.9034090909090909 x 100 = -90.34%