-43.68% is the change from 570 to 321
Calculation steps:
[( 321 - 570 ) ÷ 570] x 100 = -43.68%
Formula
Percentage change = [(321 - 570) / 570] x 100
Subtract the new number by the original number
321 - 570 = -249
-249 ÷ 570 = -0.4368421052631579
-0.4368421052631579 x 100 = -43.68%