-30.82% is the change from 837 to 579
Calculation steps:
[( 579 - 837 ) ÷ 837] x 100 = -30.82%
Formula
Percentage change = [(579 - 837) / 837] x 100
Subtract the new number by the original number
579 - 837 = -258
-258 ÷ 837 = -0.30824372759856633
-0.30824372759856633 x 100 = -30.82%