-21.52% is the change from 539 to 423
Calculation steps:
[( 423 - 539 ) ÷ 539] x 100 = -21.52%
Formula
Percentage change = [(423 - 539) / 539] x 100
Subtract the new number by the original number
423 - 539 = -116
-116 ÷ 539 = -0.21521335807050093
-0.21521335807050093 x 100 = -21.52%