3.5% is the change from 828 to 857
Calculation steps:
[( 857 - 828 ) ÷ 828] x 100 = 3.5%
Formula
Percentage change = [(857 - 828) / 828] x 100
Subtract the new number by the original number
857 - 828 = 29
29 ÷ 828 = 0.035024154589371984
0.035024154589371984 x 100 = 3.5%