-3.27% is the change from 857 to 829
Calculation steps:
[( 829 - 857 ) ÷ 857] x 100 = -3.27%
Formula
Percentage change = [(829 - 857) / 857] x 100
Subtract the new number by the original number
829 - 857 = -28
-28 ÷ 857 = -0.03267211201866978
-0.03267211201866978 x 100 = -3.27%