23.4% is the change from 671 to 828
Calculation steps:
[( 828 - 671 ) ÷ 671] x 100 = 23.4%
Formula
Percentage change = [(828 - 671) / 671] x 100
Subtract the new number by the original number
828 - 671 = 157
157 ÷ 671 = 0.23397913561847988
0.23397913561847988 x 100 = 23.4%