-25.87% is the change from 858 to 636
Calculation steps:
[( 636 - 858 ) ÷ 858] x 100 = -25.87%
Formula
Percentage change = [(636 - 858) / 858] x 100
Subtract the new number by the original number
636 - 858 = -222
-222 ÷ 858 = -0.25874125874125875
-0.25874125874125875 x 100 = -25.87%