-31.04% is the change from 828 to 571
Calculation steps:
[( 571 - 828 ) ÷ 828] x 100 = -31.04%
Formula
Percentage change = [(571 - 828) / 828] x 100
Subtract the new number by the original number
571 - 828 = -257
-257 ÷ 828 = -0.3103864734299517
-0.3103864734299517 x 100 = -31.04%