6.6% is the change from 515 to 549
Calculation steps:
[( 549 - 515 ) ÷ 515] x 100 = 6.6%
Formula
Percentage change = [(549 - 515) / 515] x 100
Subtract the new number by the original number
549 - 515 = 34
34 ÷ 515 = 0.06601941747572816
0.06601941747572816 x 100 = 6.6%