-10.24% is the change from 879 to 789
Calculation steps:
[( 789 - 879 ) ÷ 879] x 100 = -10.24%
Formula
Percentage change = [(789 - 879) / 879] x 100
Subtract the new number by the original number
789 - 879 = -90
-90 ÷ 879 = -0.10238907849829351
-0.10238907849829351 x 100 = -10.24%