-50.23% is the change from 858 to 427
Calculation steps:
[( 427 - 858 ) ÷ 858] x 100 = -50.23%
Formula
Percentage change = [(427 - 858) / 858] x 100
Subtract the new number by the original number
427 - 858 = -431
-431 ÷ 858 = -0.5023310023310024
-0.5023310023310024 x 100 = -50.23%