28.76% is the change from 671 to 864
Calculation steps:
[( 864 - 671 ) ÷ 671] x 100 = 28.76%
Formula
Percentage change = [(864 - 671) / 671] x 100
Subtract the new number by the original number
864 - 671 = 193
193 ÷ 671 = 0.28763040238450077
0.28763040238450077 x 100 = 28.76%