-30.83% is the change from 824 to 570
Calculation steps:
[( 570 - 824 ) ÷ 824] x 100 = -30.83%
Formula
Percentage change = [(570 - 824) / 824] x 100
Subtract the new number by the original number
570 - 824 = -254
-254 ÷ 824 = -0.308252427184466
-0.308252427184466 x 100 = -30.83%