-87.3% is the change from 858 to 109
Calculation steps:
[( 109 - 858 ) ÷ 858] x 100 = -87.3%
Formula
Percentage change = [(109 - 858) / 858] x 100
Subtract the new number by the original number
109 - 858 = -749
-749 ÷ 858 = -0.872960372960373
-0.872960372960373 x 100 = -87.3%