48.33% is the change from 449 to 666
Calculation steps:
[( 666 - 449 ) ÷ 449] x 100 = 48.33%
Formula
Percentage change = [(666 - 449) / 449] x 100
Subtract the new number by the original number
666 - 449 = 217
217 ÷ 449 = 0.48329621380846327
0.48329621380846327 x 100 = 48.33%