-7.12% is the change from 871 to 809
Calculation steps:
[( 809 - 871 ) ÷ 871] x 100 = -7.12%
Formula
Percentage change = [(809 - 871) / 871] x 100
Subtract the new number by the original number
809 - 871 = -62
-62 ÷ 871 = -0.0711825487944891
-0.0711825487944891 x 100 = -7.12%