-24.15% is the change from 820 to 622
Calculation steps:
[( 622 - 820 ) ÷ 820] x 100 = -24.15%
Formula
Percentage change = [(622 - 820) / 820] x 100
Subtract the new number by the original number
622 - 820 = -198
-198 ÷ 820 = -0.24146341463414633
-0.24146341463414633 x 100 = -24.15%