-0.82% is the change from 122 to 121
Calculation steps:
[( 121 - 122 ) ÷ 122] x 100 = -0.82%
Formula
Percentage change = [(121 - 122) / 122] x 100
Subtract the new number by the original number
121 - 122 = -1
-1 ÷ 122 = -0.00819672131147541
-0.00819672131147541 x 100 = -0.82%