-27.62% is the change from 181 to 131
Calculation steps:
[( 131 - 181 ) ÷ 181] x 100 = -27.62%
Formula
Percentage change = [(131 - 181) / 181] x 100
Subtract the new number by the original number
131 - 181 = -50
-50 ÷ 181 = -0.27624309392265195
-0.27624309392265195 x 100 = -27.62%