-22.58% is the change from 828 to 641
Calculation steps:
[( 641 - 828 ) ÷ 828] x 100 = -22.58%
Formula
Percentage change = [(641 - 828) / 828] x 100
Subtract the new number by the original number
641 - 828 = -187
-187 ÷ 828 = -0.22584541062801933
-0.22584541062801933 x 100 = -22.58%