5.5% is the change from 491 to 518
Calculation steps:
[( 518 - 491 ) ÷ 491] x 100 = 5.5%
Formula
Percentage change = [(518 - 491) / 491] x 100
Subtract the new number by the original number
518 - 491 = 27
27 ÷ 491 = 0.054989816700611
0.054989816700611 x 100 = 5.5%