-4.91% is the change from 611 to 581
Calculation steps:
[( 581 - 611 ) ÷ 611] x 100 = -4.91%
Formula
Percentage change = [(581 - 611) / 611] x 100
Subtract the new number by the original number
581 - 611 = -30
-30 ÷ 611 = -0.049099836333878884
-0.049099836333878884 x 100 = -4.91%