22.21% is the change from 671 to 820
Calculation steps:
[( 820 - 671 ) ÷ 671] x 100 = 22.21%
Formula
Percentage change = [(820 - 671) / 671] x 100
Subtract the new number by the original number
820 - 671 = 149
149 ÷ 671 = 0.22205663189269748
0.22205663189269748 x 100 = 22.21%