-97.2% is the change from 858 to 24
Calculation steps:
[( 24 - 858 ) ÷ 858] x 100 = -97.2%
Formula
Percentage change = [(24 - 858) / 858] x 100
Subtract the new number by the original number
24 - 858 = -834
-834 ÷ 858 = -0.972027972027972
-0.972027972027972 x 100 = -97.2%