-8.09% is the change from 878 to 807
Calculation steps:
[( 807 - 878 ) ÷ 878] x 100 = -8.09%
Formula
Percentage change = [(807 - 878) / 878] x 100
Subtract the new number by the original number
807 - 878 = -71
-71 ÷ 878 = -0.08086560364464693
-0.08086560364464693 x 100 = -8.09%