-84.54% is the change from 828 to 128
Calculation steps:
[( 128 - 828 ) ÷ 828] x 100 = -84.54%
Formula
Percentage change = [(128 - 828) / 828] x 100
Subtract the new number by the original number
128 - 828 = -700
-700 ÷ 828 = -0.8454106280193237
-0.8454106280193237 x 100 = -84.54%