-30.96% is the change from 827 to 571
Calculation steps:
[( 571 - 827 ) ÷ 827] x 100 = -30.96%
Formula
Percentage change = [(571 - 827) / 827] x 100
Subtract the new number by the original number
571 - 827 = -256
-256 ÷ 827 = -0.309552599758162
-0.309552599758162 x 100 = -30.96%