-30.12% is the change from 571 to 399
Calculation steps:
[( 399 - 571 ) ÷ 571] x 100 = -30.12%
Formula
Percentage change = [(399 - 571) / 571] x 100
Subtract the new number by the original number
399 - 571 = -172
-172 ÷ 571 = -0.30122591943957966
-0.30122591943957966 x 100 = -30.12%