-83.8% is the change from 858 to 139
Calculation steps:
[( 139 - 858 ) ÷ 858] x 100 = -83.8%
Formula
Percentage change = [(139 - 858) / 858] x 100
Subtract the new number by the original number
139 - 858 = -719
-719 ÷ 858 = -0.837995337995338
-0.837995337995338 x 100 = -83.8%