36.73% is the change from 226 to 309
Calculation steps:
[( 309 - 226 ) ÷ 226] x 100 = 36.73%
Formula
Percentage change = [(309 - 226) / 226] x 100
Subtract the new number by the original number
309 - 226 = 83
83 ÷ 226 = 0.3672566371681416
0.3672566371681416 x 100 = 36.73%