-22.38% is the change from 858 to 666
Calculation steps:
[( 666 - 858 ) ÷ 858] x 100 = -22.38%
Formula
Percentage change = [(666 - 858) / 858] x 100
Subtract the new number by the original number
666 - 858 = -192
-192 ÷ 858 = -0.22377622377622378
-0.22377622377622378 x 100 = -22.38%