-39.49% is the change from 828 to 501
Calculation steps:
[( 501 - 828 ) ÷ 828] x 100 = -39.49%
Formula
Percentage change = [(501 - 828) / 828] x 100
Subtract the new number by the original number
501 - 828 = -327
-327 ÷ 828 = -0.39492753623188404
-0.39492753623188404 x 100 = -39.49%