-12.71% is the change from 181 to 158
Calculation steps:
[( 158 - 181 ) ÷ 181] x 100 = -12.71%
Formula
Percentage change = [(158 - 181) / 181] x 100
Subtract the new number by the original number
158 - 181 = -23
-23 ÷ 181 = -0.1270718232044199
-0.1270718232044199 x 100 = -12.71%