3.1% is the change from 549 to 566
Calculation steps:
[( 566 - 549 ) ÷ 549] x 100 = 3.1%
Formula
Percentage change = [(566 - 549) / 549] x 100
Subtract the new number by the original number
566 - 549 = 17
17 ÷ 549 = 0.030965391621129327
0.030965391621129327 x 100 = 3.1%