-1.71% is the change from 878 to 863
Calculation steps:
[( 863 - 878 ) ÷ 878] x 100 = -1.71%
Formula
Percentage change = [(863 - 878) / 878] x 100
Subtract the new number by the original number
863 - 878 = -15
-15 ÷ 878 = -0.017084282460136675
-0.017084282460136675 x 100 = -1.71%