-90.61% is the change from 905 to 85
Calculation steps:
[( 85 - 905 ) ÷ 905] x 100 = -90.61%
Formula
Percentage change = [(85 - 905) / 905] x 100
Subtract the new number by the original number
85 - 905 = -820
-820 ÷ 905 = -0.9060773480662984
-0.9060773480662984 x 100 = -90.61%