-18.73% is the change from 822 to 668
Calculation steps:
[( 668 - 822 ) ÷ 822] x 100 = -18.73%
Formula
Percentage change = [(668 - 822) / 822] x 100
Subtract the new number by the original number
668 - 822 = -154
-154 ÷ 822 = -0.1873479318734793
-0.1873479318734793 x 100 = -18.73%