-4.25% is the change from 871 to 834
Calculation steps:
[( 834 - 871 ) ÷ 871] x 100 = -4.25%
Formula
Percentage change = [(834 - 871) / 871] x 100
Subtract the new number by the original number
834 - 871 = -37
-37 ÷ 871 = -0.04247990815154994
-0.04247990815154994 x 100 = -4.25%