2.93% is the change from 649 to 668
Calculation steps:
[( 668 - 649 ) ÷ 649] x 100 = 2.93%
Formula
Percentage change = [(668 - 649) / 649] x 100
Subtract the new number by the original number
668 - 649 = 19
19 ÷ 649 = 0.029275808936825885
0.029275808936825885 x 100 = 2.93%