-51.21% is the change from 828 to 404
Calculation steps:
[( 404 - 828 ) ÷ 828] x 100 = -51.21%
Formula
Percentage change = [(404 - 828) / 828] x 100
Subtract the new number by the original number
404 - 828 = -424
-424 ÷ 828 = -0.5120772946859904
-0.5120772946859904 x 100 = -51.21%