5.1% is the change from 549 to 577
Calculation steps:
[( 577 - 549 ) ÷ 549] x 100 = 5.1%
Formula
Percentage change = [(577 - 549) / 549] x 100
Subtract the new number by the original number
577 - 549 = 28
28 ÷ 549 = 0.051001821493624776
0.051001821493624776 x 100 = 5.1%