40.87% is the change from 323 to 455
Calculation steps:
[( 455 - 323 ) ÷ 323] x 100 = 40.87%
Formula
Percentage change = [(455 - 323) / 323] x 100
Subtract the new number by the original number
455 - 323 = 132
132 ÷ 323 = 0.4086687306501548
0.4086687306501548 x 100 = 40.87%