5.5% is the change from 509 to 537
Calculation steps:
[( 537 - 509 ) ÷ 509] x 100 = 5.5%
Formula
Percentage change = [(537 - 509) / 509] x 100
Subtract the new number by the original number
537 - 509 = 28
28 ÷ 509 = 0.0550098231827112
0.0550098231827112 x 100 = 5.5%