31.78% is the change from 409 to 539
Calculation steps:
[( 539 - 409 ) ÷ 409] x 100 = 31.78%
Formula
Percentage change = [(539 - 409) / 409] x 100
Subtract the new number by the original number
539 - 409 = 130
130 ÷ 409 = 0.31784841075794623
0.31784841075794623 x 100 = 31.78%