-5.69% is the change from 878 to 828
Calculation steps:
[( 828 - 878 ) ÷ 878] x 100 = -5.69%
Formula
Percentage change = [(828 - 878) / 878] x 100
Subtract the new number by the original number
828 - 878 = -50
-50 ÷ 878 = -0.05694760820045558
-0.05694760820045558 x 100 = -5.69%