28.17% is the change from 646 to 828
Calculation steps:
[( 828 - 646 ) ÷ 646] x 100 = 28.17%
Formula
Percentage change = [(828 - 646) / 646] x 100
Subtract the new number by the original number
828 - 646 = 182
182 ÷ 646 = 0.28173374613003094
0.28173374613003094 x 100 = 28.17%