-38.65% is the change from 828 to 508
Calculation steps:
[( 508 - 828 ) ÷ 828] x 100 = -38.65%
Formula
Percentage change = [(508 - 828) / 828] x 100
Subtract the new number by the original number
508 - 828 = -320
-320 ÷ 828 = -0.3864734299516908
-0.3864734299516908 x 100 = -38.65%