-89.86% is the change from 858 to 87
Calculation steps:
[( 87 - 858 ) ÷ 858] x 100 = -89.86%
Formula
Percentage change = [(87 - 858) / 858] x 100
Subtract the new number by the original number
87 - 858 = -771
-771 ÷ 858 = -0.8986013986013986
-0.8986013986013986 x 100 = -89.86%