-28.29% is the change from 251 to 180
Calculation steps:
[( 180 - 251 ) ÷ 251] x 100 = -28.29%
Formula
Percentage change = [(180 - 251) / 251] x 100
Subtract the new number by the original number
180 - 251 = -71
-71 ÷ 251 = -0.28286852589641437
-0.28286852589641437 x 100 = -28.29%