-53.93% is the change from 280 to 129
Calculation steps:
[( 129 - 280 ) ÷ 280] x 100 = -53.93%
Formula
Percentage change = [(129 - 280) / 280] x 100
Subtract the new number by the original number
129 - 280 = -151
-151 ÷ 280 = -0.5392857142857143
-0.5392857142857143 x 100 = -53.93%