-81.08% is the change from 539 to 102
Calculation steps:
[( 102 - 539 ) ÷ 539] x 100 = -81.08%
Formula
Percentage change = [(102 - 539) / 539] x 100
Subtract the new number by the original number
102 - 539 = -437
-437 ÷ 539 = -0.8107606679035251
-0.8107606679035251 x 100 = -81.08%