6.88% is the change from 509 to 544
Calculation steps:
[( 544 - 509 ) ÷ 509] x 100 = 6.88%
Formula
Percentage change = [(544 - 509) / 509] x 100
Subtract the new number by the original number
544 - 509 = 35
35 ÷ 509 = 0.068762278978389
0.068762278978389 x 100 = 6.88%