20.42% is the change from 671 to 808
Calculation steps:
[( 808 - 671 ) ÷ 671] x 100 = 20.42%
Formula
Percentage change = [(808 - 671) / 671] x 100
Subtract the new number by the original number
808 - 671 = 137
137 ÷ 671 = 0.20417287630402384
0.20417287630402384 x 100 = 20.42%