-10.35% is the change from 879 to 788
Calculation steps:
[( 788 - 879 ) ÷ 879] x 100 = -10.35%
Formula
Percentage change = [(788 - 879) / 879] x 100
Subtract the new number by the original number
788 - 879 = -91
-91 ÷ 879 = -0.10352673492605233
-0.10352673492605233 x 100 = -10.35%