-3.44% is the change from 871 to 841
Calculation steps:
[( 841 - 871 ) ÷ 871] x 100 = -3.44%
Formula
Percentage change = [(841 - 871) / 871] x 100
Subtract the new number by the original number
841 - 871 = -30
-30 ÷ 871 = -0.03444316877152698
-0.03444316877152698 x 100 = -3.44%