-58.82% is the change from 680 to 280
Calculation steps:
[( 280 - 680 ) ÷ 680] x 100 = -58.82%
Formula
Percentage change = [(280 - 680) / 680] x 100
Subtract the new number by the original number
280 - 680 = -400
-400 ÷ 680 = -0.5882352941176471
-0.5882352941176471 x 100 = -58.82%