-36.23% is the change from 828 to 528
Calculation steps:
[( 528 - 828 ) ÷ 828] x 100 = -36.23%
Formula
Percentage change = [(528 - 828) / 828] x 100
Subtract the new number by the original number
528 - 828 = -300
-300 ÷ 828 = -0.36231884057971014
-0.36231884057971014 x 100 = -36.23%