2.23% is the change from 537 to 549
Calculation steps:
[( 549 - 537 ) ÷ 537] x 100 = 2.23%
Formula
Percentage change = [(549 - 537) / 537] x 100
Subtract the new number by the original number
549 - 537 = 12
12 ÷ 537 = 0.0223463687150838
0.0223463687150838 x 100 = 2.23%