-86.6% is the change from 858 to 115
Calculation steps:
[( 115 - 858 ) ÷ 858] x 100 = -86.6%
Formula
Percentage change = [(115 - 858) / 858] x 100
Subtract the new number by the original number
115 - 858 = -743
-743 ÷ 858 = -0.865967365967366
-0.865967365967366 x 100 = -86.6%