-3.19% is the change from 879 to 851
Calculation steps:
[( 851 - 879 ) ÷ 879] x 100 = -3.19%
Formula
Percentage change = [(851 - 879) / 879] x 100
Subtract the new number by the original number
851 - 879 = -28
-28 ÷ 879 = -0.03185437997724687
-0.03185437997724687 x 100 = -3.19%