20.12% is the change from 671 to 806
Calculation steps:
[( 806 - 671 ) ÷ 671] x 100 = 20.12%
Formula
Percentage change = [(806 - 671) / 671] x 100
Subtract the new number by the original number
806 - 671 = 135
135 ÷ 671 = 0.20119225037257824
0.20119225037257824 x 100 = 20.12%