-27.89% is the change from 251 to 181
Calculation steps:
[( 181 - 251 ) ÷ 251] x 100 = -27.89%
Formula
Percentage change = [(181 - 251) / 251] x 100
Subtract the new number by the original number
181 - 251 = -70
-70 ÷ 251 = -0.2788844621513944
-0.2788844621513944 x 100 = -27.89%