-5.01% is the change from 878 to 834
Calculation steps:
[( 834 - 878 ) ÷ 878] x 100 = -5.01%
Formula
Percentage change = [(834 - 878) / 878] x 100
Subtract the new number by the original number
834 - 878 = -44
-44 ÷ 878 = -0.05011389521640091
-0.05011389521640091 x 100 = -5.01%