-19.34% is the change from 822 to 663
Calculation steps:
[( 663 - 822 ) ÷ 822] x 100 = -19.34%
Formula
Percentage change = [(663 - 822) / 822] x 100
Subtract the new number by the original number
663 - 822 = -159
-159 ÷ 822 = -0.19343065693430658
-0.19343065693430658 x 100 = -19.34%