-30.59% is the change from 837 to 581
Calculation steps:
[( 581 - 837 ) ÷ 837] x 100 = -30.59%
Formula
Percentage change = [(581 - 837) / 837] x 100
Subtract the new number by the original number
581 - 837 = -256
-256 ÷ 837 = -0.3058542413381123
-0.3058542413381123 x 100 = -30.59%