2.5% is the change from 721 to 739
Calculation steps:
[( 739 - 721 ) ÷ 721] x 100 = 2.5%
Formula
Percentage change = [(739 - 721) / 721] x 100
Subtract the new number by the original number
739 - 721 = 18
18 ÷ 721 = 0.024965325936199722
0.024965325936199722 x 100 = 2.5%