19.23% is the change from 671 to 800
Calculation steps:
[( 800 - 671 ) ÷ 671] x 100 = 19.23%
Formula
Percentage change = [(800 - 671) / 671] x 100
Subtract the new number by the original number
800 - 671 = 129
129 ÷ 671 = 0.19225037257824143
0.19225037257824143 x 100 = 19.23%