-99.88% is the change from 858 to 1
Calculation steps:
[( 1 - 858 ) ÷ 858] x 100 = -99.88%
Formula
Percentage change = [(1 - 858) / 858] x 100
Subtract the new number by the original number
1 - 858 = -857
-857 ÷ 858 = -0.9988344988344988
-0.9988344988344988 x 100 = -99.88%