-30.74% is the change from 823 to 570
Calculation steps:
[( 570 - 823 ) ÷ 823] x 100 = -30.74%
Formula
Percentage change = [(570 - 823) / 823] x 100
Subtract the new number by the original number
570 - 823 = -253
-253 ÷ 823 = -0.30741190765492105
-0.30741190765492105 x 100 = -30.74%