-90.21% is the change from 858 to 84
Calculation steps:
[( 84 - 858 ) ÷ 858] x 100 = -90.21%
Formula
Percentage change = [(84 - 858) / 858] x 100
Subtract the new number by the original number
84 - 858 = -774
-774 ÷ 858 = -0.9020979020979021
-0.9020979020979021 x 100 = -90.21%