-33.61% is the change from 122 to 81
Calculation steps:
[( 81 - 122 ) ÷ 122] x 100 = -33.61%
Formula
Percentage change = [(81 - 122) / 122] x 100
Subtract the new number by the original number
81 - 122 = -41
-41 ÷ 122 = -0.3360655737704918
-0.3360655737704918 x 100 = -33.61%