-23.55% is the change from 828 to 633
Calculation steps:
[( 633 - 828 ) ÷ 828] x 100 = -23.55%
Formula
Percentage change = [(633 - 828) / 828] x 100
Subtract the new number by the original number
633 - 828 = -195
-195 ÷ 828 = -0.23550724637681159
-0.23550724637681159 x 100 = -23.55%