-2.19% is the change from 549 to 537
Calculation steps:
[( 537 - 549 ) ÷ 549] x 100 = -2.19%
Formula
Percentage change = [(537 - 549) / 549] x 100
Subtract the new number by the original number
537 - 549 = -12
-12 ÷ 549 = -0.02185792349726776
-0.02185792349726776 x 100 = -2.19%