-30.32% is the change from 818 to 570
Calculation steps:
[( 570 - 818 ) ÷ 818] x 100 = -30.32%
Formula
Percentage change = [(570 - 818) / 818] x 100
Subtract the new number by the original number
570 - 818 = -248
-248 ÷ 818 = -0.30317848410757947
-0.30317848410757947 x 100 = -30.32%