-23.79% is the change from 828 to 631
Calculation steps:
[( 631 - 828 ) ÷ 828] x 100 = -23.79%
Formula
Percentage change = [(631 - 828) / 828] x 100
Subtract the new number by the original number
631 - 828 = -197
-197 ÷ 828 = -0.23792270531400966
-0.23792270531400966 x 100 = -23.79%