-89.72% is the change from 827 to 85
Calculation steps:
[( 85 - 827 ) ÷ 827] x 100 = -89.72%
Formula
Percentage change = [(85 - 827) / 827] x 100
Subtract the new number by the original number
85 - 827 = -742
-742 ÷ 827 = -0.8972188633615478
-0.8972188633615478 x 100 = -89.72%