5.5% is the change from 309 to 326
Calculation steps:
[( 326 - 309 ) ÷ 309] x 100 = 5.5%
Formula
Percentage change = [(326 - 309) / 309] x 100
Subtract the new number by the original number
326 - 309 = 17
17 ÷ 309 = 0.05501618122977346
0.05501618122977346 x 100 = 5.5%