-31.08% is the change from 827 to 570
Calculation steps:
[( 570 - 827 ) ÷ 827] x 100 = -31.08%
Formula
Percentage change = [(570 - 827) / 827] x 100
Subtract the new number by the original number
570 - 827 = -257
-257 ÷ 827 = -0.31076178960096734
-0.31076178960096734 x 100 = -31.08%