8.1% is the change from 667 to 721
Calculation steps:
[( 721 - 667 ) ÷ 667] x 100 = 8.1%
Formula
Percentage change = [(721 - 667) / 667] x 100
Subtract the new number by the original number
721 - 667 = 54
54 ÷ 667 = 0.08095952023988005
0.08095952023988005 x 100 = 8.1%