-1.69% is the change from 591 to 581
Calculation steps:
[( 581 - 591 ) ÷ 591] x 100 = -1.69%
Formula
Percentage change = [(581 - 591) / 591] x 100
Subtract the new number by the original number
581 - 591 = -10
-10 ÷ 591 = -0.01692047377326565
-0.01692047377326565 x 100 = -1.69%