3.39% is the change from 649 to 671
Calculation steps:
[( 671 - 649 ) ÷ 649] x 100 = 3.39%
Formula
Percentage change = [(671 - 649) / 649] x 100
Subtract the new number by the original number
671 - 649 = 22
22 ÷ 649 = 0.03389830508474576
0.03389830508474576 x 100 = 3.39%