-24.59% is the change from 858 to 647
Calculation steps:
[( 647 - 858 ) ÷ 858] x 100 = -24.59%
Formula
Percentage change = [(647 - 858) / 858] x 100
Subtract the new number by the original number
647 - 858 = -211
-211 ÷ 858 = -0.24592074592074592
-0.24592074592074592 x 100 = -24.59%