-29.96% is the change from 831 to 582
Calculation steps:
[( 582 - 831 ) ÷ 831] x 100 = -29.96%
Formula
Percentage change = [(582 - 831) / 831] x 100
Subtract the new number by the original number
582 - 831 = -249
-249 ÷ 831 = -0.2996389891696751
-0.2996389891696751 x 100 = -29.96%