46.93% is the change from 309 to 454
Calculation steps:
[( 454 - 309 ) ÷ 309] x 100 = 46.93%
Formula
Percentage change = [(454 - 309) / 309] x 100
Subtract the new number by the original number
454 - 309 = 145
145 ÷ 309 = 0.4692556634304207
0.4692556634304207 x 100 = 46.93%