-23.58% is the change from 878 to 671
Calculation steps:
[( 671 - 878 ) ÷ 878] x 100 = -23.58%
Formula
Percentage change = [(671 - 878) / 878] x 100
Subtract the new number by the original number
671 - 878 = -207
-207 ÷ 878 = -0.2357630979498861
-0.2357630979498861 x 100 = -23.58%