-16.51% is the change from 539 to 450
Calculation steps:
[( 450 - 539 ) ÷ 539] x 100 = -16.51%
Formula
Percentage change = [(450 - 539) / 539] x 100
Subtract the new number by the original number
450 - 539 = -89
-89 ÷ 539 = -0.16512059369202226
-0.16512059369202226 x 100 = -16.51%