2.73% is the change from 549 to 564
Calculation steps:
[( 564 - 549 ) ÷ 549] x 100 = 2.73%
Formula
Percentage change = [(564 - 549) / 549] x 100
Subtract the new number by the original number
564 - 549 = 15
15 ÷ 549 = 0.0273224043715847
0.0273224043715847 x 100 = 2.73%