-53.14% is the change from 828 to 388
Calculation steps:
[( 388 - 828 ) ÷ 828] x 100 = -53.14%
Formula
Percentage change = [(388 - 828) / 828] x 100
Subtract the new number by the original number
388 - 828 = -440
-440 ÷ 828 = -0.5314009661835749
-0.5314009661835749 x 100 = -53.14%