-24.71% is the change from 858 to 646
Calculation steps:
[( 646 - 858 ) ÷ 858] x 100 = -24.71%
Formula
Percentage change = [(646 - 858) / 858] x 100
Subtract the new number by the original number
646 - 858 = -212
-212 ÷ 858 = -0.24708624708624707
-0.24708624708624707 x 100 = -24.71%