-15.77% is the change from 539 to 454
Calculation steps:
[( 454 - 539 ) ÷ 539] x 100 = -15.77%
Formula
Percentage change = [(454 - 539) / 539] x 100
Subtract the new number by the original number
454 - 539 = -85
-85 ÷ 539 = -0.15769944341372913
-0.15769944341372913 x 100 = -15.77%