5.1% is the change from 686 to 721
Calculation steps:
[( 721 - 686 ) ÷ 686] x 100 = 5.1%
Formula
Percentage change = [(721 - 686) / 686] x 100
Subtract the new number by the original number
721 - 686 = 35
35 ÷ 686 = 0.05102040816326531
0.05102040816326531 x 100 = 5.1%