-34.9% is the change from 828 to 539
Calculation steps:
[( 539 - 828 ) ÷ 828] x 100 = -34.9%
Formula
Percentage change = [(539 - 828) / 828] x 100
Subtract the new number by the original number
539 - 828 = -289
-289 ÷ 828 = -0.34903381642512077
-0.34903381642512077 x 100 = -34.9%