-48.05% is the change from 539 to 280
Calculation steps:
[( 280 - 539 ) ÷ 539] x 100 = -48.05%
Formula
Percentage change = [(280 - 539) / 539] x 100
Subtract the new number by the original number
280 - 539 = -259
-259 ÷ 539 = -0.4805194805194805
-0.4805194805194805 x 100 = -48.05%