-44.64% is the change from 280 to 155
Calculation steps:
[( 155 - 280 ) ÷ 280] x 100 = -44.64%
Formula
Percentage change = [(155 - 280) / 280] x 100
Subtract the new number by the original number
155 - 280 = -125
-125 ÷ 280 = -0.44642857142857145
-0.44642857142857145 x 100 = -44.64%