-84.15% is the change from 858 to 136
Calculation steps:
[( 136 - 858 ) ÷ 858] x 100 = -84.15%
Formula
Percentage change = [(136 - 858) / 858] x 100
Subtract the new number by the original number
136 - 858 = -722
-722 ÷ 858 = -0.8414918414918415
-0.8414918414918415 x 100 = -84.15%