-5.51% is the change from 871 to 823
Calculation steps:
[( 823 - 871 ) ÷ 871] x 100 = -5.51%
Formula
Percentage change = [(823 - 871) / 871] x 100
Subtract the new number by the original number
823 - 871 = -48
-48 ÷ 871 = -0.05510907003444317
-0.05510907003444317 x 100 = -5.51%