38.31% is the change from 449 to 621
Calculation steps:
[( 621 - 449 ) ÷ 449] x 100 = 38.31%
Formula
Percentage change = [(621 - 449) / 449] x 100
Subtract the new number by the original number
621 - 449 = 172
172 ÷ 449 = 0.3830734966592428
0.3830734966592428 x 100 = 38.31%