-42.86% is the change from 280 to 160
Calculation steps:
[( 160 - 280 ) ÷ 280] x 100 = -42.86%
Formula
Percentage change = [(160 - 280) / 280] x 100
Subtract the new number by the original number
160 - 280 = -120
-120 ÷ 280 = -0.42857142857142855
-0.42857142857142855 x 100 = -42.86%