-31.16% is the change from 828 to 570
Calculation steps:
[( 570 - 828 ) ÷ 828] x 100 = -31.16%
Formula
Percentage change = [(570 - 828) / 828] x 100
Subtract the new number by the original number
570 - 828 = -258
-258 ÷ 828 = -0.3115942028985507
-0.3115942028985507 x 100 = -31.16%