21.01% is the change from 671 to 812
Calculation steps:
[( 812 - 671 ) ÷ 671] x 100 = 21.01%
Formula
Percentage change = [(812 - 671) / 671] x 100
Subtract the new number by the original number
812 - 671 = 141
141 ÷ 671 = 0.21013412816691504
0.21013412816691504 x 100 = 21.01%