-90.66% is the change from 910 to 85
Calculation steps:
[( 85 - 910 ) ÷ 910] x 100 = -90.66%
Formula
Percentage change = [(85 - 910) / 910] x 100
Subtract the new number by the original number
85 - 910 = -825
-825 ÷ 910 = -0.9065934065934066
-0.9065934065934066 x 100 = -90.66%