16.39% is the change from 549 to 639
Calculation steps:
[( 639 - 549 ) ÷ 549] x 100 = 16.39%
Formula
Percentage change = [(639 - 549) / 549] x 100
Subtract the new number by the original number
639 - 549 = 90
90 ÷ 549 = 0.16393442622950818
0.16393442622950818 x 100 = 16.39%