-12.15% is the change from 181 to 159
Calculation steps:
[( 159 - 181 ) ÷ 181] x 100 = -12.15%
Formula
Percentage change = [(159 - 181) / 181] x 100
Subtract the new number by the original number
159 - 181 = -22
-22 ÷ 181 = -0.12154696132596685
-0.12154696132596685 x 100 = -12.15%