-98.67% is the change from 828 to 11
Calculation steps:
[( 11 - 828 ) ÷ 828] x 100 = -98.67%
Formula
Percentage change = [(11 - 828) / 828] x 100
Subtract the new number by the original number
11 - 828 = -817
-817 ÷ 828 = -0.9867149758454107
-0.9867149758454107 x 100 = -98.67%