-18% is the change from 539 to 442
Calculation steps:
[( 442 - 539 ) ÷ 539] x 100 = -18%
Formula
Percentage change = [(442 - 539) / 539] x 100
Subtract the new number by the original number
442 - 539 = -97
-97 ÷ 539 = -0.17996289424860853
-0.17996289424860853 x 100 = -18%