-20.75% is the change from 858 to 680
Calculation steps:
[( 680 - 858 ) ÷ 858] x 100 = -20.75%
Formula
Percentage change = [(680 - 858) / 858] x 100
Subtract the new number by the original number
680 - 858 = -178
-178 ÷ 858 = -0.20745920745920746
-0.20745920745920746 x 100 = -20.75%