19.61% is the change from 459 to 549
Calculation steps:
[( 549 - 459 ) ÷ 459] x 100 = 19.61%
Formula
Percentage change = [(549 - 459) / 459] x 100
Subtract the new number by the original number
549 - 459 = 90
90 ÷ 459 = 0.19607843137254902
0.19607843137254902 x 100 = 19.61%