-21.7% is the change from 728 to 570
Calculation steps:
[( 570 - 728 ) ÷ 728] x 100 = -21.7%
Formula
Percentage change = [(570 - 728) / 728] x 100
Subtract the new number by the original number
570 - 728 = -158
-158 ÷ 728 = -0.21703296703296704
-0.21703296703296704 x 100 = -21.7%