11.61% is the change from 646 to 721
Calculation steps:
[( 721 - 646 ) ÷ 646] x 100 = 11.61%
Formula
Percentage change = [(721 - 646) / 646] x 100
Subtract the new number by the original number
721 - 646 = 75
75 ÷ 646 = 0.11609907120743033
0.11609907120743033 x 100 = 11.61%