6.97% is the change from 646 to 691
Calculation steps:
[( 691 - 646 ) ÷ 646] x 100 = 6.97%
Formula
Percentage change = [(691 - 646) / 646] x 100
Subtract the new number by the original number
691 - 646 = 45
45 ÷ 646 = 0.0696594427244582
0.0696594427244582 x 100 = 6.97%