-19.22% is the change from 822 to 664
Calculation steps:
[( 664 - 822 ) ÷ 822] x 100 = -19.22%
Formula
Percentage change = [(664 - 822) / 822] x 100
Subtract the new number by the original number
664 - 822 = -158
-158 ÷ 822 = -0.1922141119221411
-0.1922141119221411 x 100 = -19.22%