-4.82% is the change from 871 to 829
Calculation steps:
[( 829 - 871 ) ÷ 871] x 100 = -4.82%
Formula
Percentage change = [(829 - 871) / 871] x 100
Subtract the new number by the original number
829 - 871 = -42
-42 ÷ 871 = -0.04822043628013777
-0.04822043628013777 x 100 = -4.82%