-6.84% is the change from 570 to 531
Calculation steps:
[( 531 - 570 ) ÷ 570] x 100 = -6.84%
Formula
Percentage change = [(531 - 570) / 570] x 100
Subtract the new number by the original number
531 - 570 = -39
-39 ÷ 570 = -0.06842105263157895
-0.06842105263157895 x 100 = -6.84%