-81.93% is the change from 858 to 155
Calculation steps:
[( 155 - 858 ) ÷ 858] x 100 = -81.93%
Formula
Percentage change = [(155 - 858) / 858] x 100
Subtract the new number by the original number
155 - 858 = -703
-703 ÷ 858 = -0.8193473193473193
-0.8193473193473193 x 100 = -81.93%