56.13% is the change from 326 to 509
Calculation steps:
[( 509 - 326 ) ÷ 326] x 100 = 56.13%
Formula
Percentage change = [(509 - 326) / 326] x 100
Subtract the new number by the original number
509 - 326 = 183
183 ÷ 326 = 0.5613496932515337
0.5613496932515337 x 100 = 56.13%