-28.88% is the change from 831 to 591
Calculation steps:
[( 591 - 831 ) ÷ 831] x 100 = -28.88%
Formula
Percentage change = [(591 - 831) / 831] x 100
Subtract the new number by the original number
591 - 831 = -240
-240 ÷ 831 = -0.2888086642599278
-0.2888086642599278 x 100 = -28.88%