12.21% is the change from 721 to 809
Calculation steps:
[( 809 - 721 ) ÷ 721] x 100 = 12.21%
Formula
Percentage change = [(809 - 721) / 721] x 100
Subtract the new number by the original number
809 - 721 = 88
88 ÷ 721 = 0.12205270457697642
0.12205270457697642 x 100 = 12.21%