-12.91% is the change from 581 to 506
Calculation steps:
[( 506 - 581 ) ÷ 581] x 100 = -12.91%
Formula
Percentage change = [(506 - 581) / 581] x 100
Subtract the new number by the original number
506 - 581 = -75
-75 ÷ 581 = -0.12908777969018934
-0.12908777969018934 x 100 = -12.91%