-85.71% is the change from 539 to 77
Calculation steps:
[( 77 - 539 ) ÷ 539] x 100 = -85.71%
Formula
Percentage change = [(77 - 539) / 539] x 100
Subtract the new number by the original number
77 - 539 = -462
-462 ÷ 539 = -0.8571428571428571
-0.8571428571428571 x 100 = -85.71%