-0.81% is the change from 123 to 122
Calculation steps:
[( 122 - 123 ) ÷ 123] x 100 = -0.81%
Formula
Percentage change = [(122 - 123) / 123] x 100
Subtract the new number by the original number
122 - 123 = -1
-1 ÷ 123 = -0.008130081300813009
-0.008130081300813009 x 100 = -0.81%