-0.9% is the change from 886 to 878
Calculation steps:
[( 878 - 886 ) ÷ 886] x 100 = -0.9%
Formula
Percentage change = [(878 - 886) / 886] x 100
Subtract the new number by the original number
878 - 886 = -8
-8 ÷ 886 = -0.009029345372460496
-0.009029345372460496 x 100 = -0.9%