-0.91% is the change from 879 to 871
Calculation steps:
[( 871 - 879 ) ÷ 879] x 100 = -0.91%
Formula
Percentage change = [(871 - 879) / 879] x 100
Subtract the new number by the original number
871 - 879 = -8
-8 ÷ 879 = -0.009101251422070534
-0.009101251422070534 x 100 = -0.91%