-11.96% is the change from 828 to 729
Calculation steps:
[( 729 - 828 ) ÷ 828] x 100 = -11.96%
Formula
Percentage change = [(729 - 828) / 828] x 100
Subtract the new number by the original number
729 - 828 = -99
-99 ÷ 828 = -0.11956521739130435
-0.11956521739130435 x 100 = -11.96%