-29.54% is the change from 809 to 570
Calculation steps:
[( 570 - 809 ) ÷ 809] x 100 = -29.54%
Formula
Percentage change = [(570 - 809) / 809] x 100
Subtract the new number by the original number
570 - 809 = -239
-239 ÷ 809 = -0.2954264524103832
-0.2954264524103832 x 100 = -29.54%