-3.67% is the change from 871 to 839
Calculation steps:
[( 839 - 871 ) ÷ 871] x 100 = -3.67%
Formula
Percentage change = [(839 - 871) / 871] x 100
Subtract the new number by the original number
839 - 871 = -32
-32 ÷ 871 = -0.03673938002296211
-0.03673938002296211 x 100 = -3.67%