30.96% is the change from 323 to 423
Calculation steps:
[( 423 - 323 ) ÷ 323] x 100 = 30.96%
Formula
Percentage change = [(423 - 323) / 323] x 100
Subtract the new number by the original number
423 - 323 = 100
100 ÷ 323 = 0.30959752321981426
0.30959752321981426 x 100 = 30.96%