-28.13% is the change from 878 to 631
Calculation steps:
[( 631 - 878 ) ÷ 878] x 100 = -28.13%
Formula
Percentage change = [(631 - 878) / 878] x 100
Subtract the new number by the original number
631 - 878 = -247
-247 ÷ 878 = -0.28132118451025057
-0.28132118451025057 x 100 = -28.13%