25.37% is the change from 406 to 509
Calculation steps:
[( 509 - 406 ) ÷ 406] x 100 = 25.37%
Formula
Percentage change = [(509 - 406) / 406] x 100
Subtract the new number by the original number
509 - 406 = 103
103 ÷ 406 = 0.2536945812807882
0.2536945812807882 x 100 = 25.37%