-23.43% is the change from 828 to 634
Calculation steps:
[( 634 - 828 ) ÷ 828] x 100 = -23.43%
Formula
Percentage change = [(634 - 828) / 828] x 100
Subtract the new number by the original number
634 - 828 = -194
-194 ÷ 828 = -0.23429951690821257
-0.23429951690821257 x 100 = -23.43%