-38.59% is the change from 539 to 331
Calculation steps:
[( 331 - 539 ) ÷ 539] x 100 = -38.59%
Formula
Percentage change = [(331 - 539) / 539] x 100
Subtract the new number by the original number
331 - 539 = -208
-208 ÷ 539 = -0.38589981447124305
-0.38589981447124305 x 100 = -38.59%