-35.14% is the change from 831 to 539
Calculation steps:
[( 539 - 831 ) ÷ 831] x 100 = -35.14%
Formula
Percentage change = [(539 - 831) / 831] x 100
Subtract the new number by the original number
539 - 831 = -292
-292 ÷ 831 = -0.35138387484957884
-0.35138387484957884 x 100 = -35.14%