-3.79% is the change from 871 to 838
Calculation steps:
[( 838 - 871 ) ÷ 871] x 100 = -3.79%
Formula
Percentage change = [(838 - 871) / 871] x 100
Subtract the new number by the original number
838 - 871 = -33
-33 ÷ 871 = -0.03788748564867968
-0.03788748564867968 x 100 = -3.79%