-30.81% is the change from 581 to 402
Calculation steps:
[( 402 - 581 ) ÷ 581] x 100 = -30.81%
Formula
Percentage change = [(402 - 581) / 581] x 100
Subtract the new number by the original number
402 - 581 = -179
-179 ÷ 581 = -0.3080895008605852
-0.3080895008605852 x 100 = -30.81%