21.36% is the change from 323 to 392
Calculation steps:
[( 392 - 323 ) ÷ 323] x 100 = 21.36%
Formula
Percentage change = [(392 - 323) / 323] x 100
Subtract the new number by the original number
392 - 323 = 69
69 ÷ 323 = 0.21362229102167182
0.21362229102167182 x 100 = 21.36%