-86.84% is the change from 828 to 109
Calculation steps:
[( 109 - 828 ) ÷ 828] x 100 = -86.84%
Formula
Percentage change = [(109 - 828) / 828] x 100
Subtract the new number by the original number
109 - 828 = -719
-719 ÷ 828 = -0.8683574879227053
-0.8683574879227053 x 100 = -86.84%