-6.12% is the change from 539 to 506
Calculation steps:
[( 506 - 539 ) ÷ 539] x 100 = -6.12%
Formula
Percentage change = [(506 - 539) / 539] x 100
Subtract the new number by the original number
506 - 539 = -33
-33 ÷ 539 = -0.061224489795918366
-0.061224489795918366 x 100 = -6.12%