-13.9% is the change from 878 to 756
Calculation steps:
[( 756 - 878 ) ÷ 878] x 100 = -13.9%
Formula
Percentage change = [(756 - 878) / 878] x 100
Subtract the new number by the original number
756 - 878 = -122
-122 ÷ 878 = -0.13895216400911162
-0.13895216400911162 x 100 = -13.9%