-19.81% is the change from 833 to 668
Calculation steps:
[( 668 - 833 ) ÷ 833] x 100 = -19.81%
Formula
Percentage change = [(668 - 833) / 833] x 100
Subtract the new number by the original number
668 - 833 = -165
-165 ÷ 833 = -0.19807923169267708
-0.19807923169267708 x 100 = -19.81%