-5.47% is the change from 878 to 830
Calculation steps:
[( 830 - 878 ) ÷ 878] x 100 = -5.47%
Formula
Percentage change = [(830 - 878) / 878] x 100
Subtract the new number by the original number
830 - 878 = -48
-48 ÷ 878 = -0.05466970387243736
-0.05466970387243736 x 100 = -5.47%