-23.8% is the change from 878 to 669
Calculation steps:
[( 669 - 878 ) ÷ 878] x 100 = -23.8%
Formula
Percentage change = [(669 - 878) / 878] x 100
Subtract the new number by the original number
669 - 878 = -209
-209 ÷ 878 = -0.23804100227790434
-0.23804100227790434 x 100 = -23.8%