-94.25% is the change from 539 to 31
Calculation steps:
[( 31 - 539 ) ÷ 539] x 100 = -94.25%
Formula
Percentage change = [(31 - 539) / 539] x 100
Subtract the new number by the original number
31 - 539 = -508
-508 ÷ 539 = -0.9424860853432282
-0.9424860853432282 x 100 = -94.25%