-30.15% is the change from 816 to 570
Calculation steps:
[( 570 - 816 ) ÷ 816] x 100 = -30.15%
Formula
Percentage change = [(570 - 816) / 816] x 100
Subtract the new number by the original number
570 - 816 = -246
-246 ÷ 816 = -0.3014705882352941
-0.3014705882352941 x 100 = -30.15%