20.74% is the change from 323 to 390
Calculation steps:
[( 390 - 323 ) ÷ 323] x 100 = 20.74%
Formula
Percentage change = [(390 - 323) / 323] x 100
Subtract the new number by the original number
390 - 323 = 67
67 ÷ 323 = 0.20743034055727555
0.20743034055727555 x 100 = 20.74%