-81.4% is the change from 828 to 154
Calculation steps:
[( 154 - 828 ) ÷ 828] x 100 = -81.4%
Formula
Percentage change = [(154 - 828) / 828] x 100
Subtract the new number by the original number
154 - 828 = -674
-674 ÷ 828 = -0.8140096618357487
-0.8140096618357487 x 100 = -81.4%