23.56% is the change from 331 to 409
Calculation steps:
[( 409 - 331 ) ÷ 331] x 100 = 23.56%
Formula
Percentage change = [(409 - 331) / 331] x 100
Subtract the new number by the original number
409 - 331 = 78
78 ÷ 331 = 0.23564954682779457
0.23564954682779457 x 100 = 23.56%