46.73% is the change from 306 to 449
Calculation steps:
[( 449 - 306 ) ÷ 306] x 100 = 46.73%
Formula
Percentage change = [(449 - 306) / 306] x 100
Subtract the new number by the original number
449 - 306 = 143
143 ÷ 306 = 0.4673202614379085
0.4673202614379085 x 100 = 46.73%