38.08% is the change from 449 to 620
Calculation steps:
[( 620 - 449 ) ÷ 449] x 100 = 38.08%
Formula
Percentage change = [(620 - 449) / 449] x 100
Subtract the new number by the original number
620 - 449 = 171
171 ÷ 449 = 0.38084632516703787
0.38084632516703787 x 100 = 38.08%