-71.82% is the change from 181 to 51
Calculation steps:
[( 51 - 181 ) ÷ 181] x 100 = -71.82%
Formula
Percentage change = [(51 - 181) / 181] x 100
Subtract the new number by the original number
51 - 181 = -130
-130 ÷ 181 = -0.7182320441988951
-0.7182320441988951 x 100 = -71.82%