49.22% is the change from 449 to 670
Calculation steps:
[( 670 - 449 ) ÷ 449] x 100 = 49.22%
Formula
Percentage change = [(670 - 449) / 449] x 100
Subtract the new number by the original number
670 - 449 = 221
221 ÷ 449 = 0.4922048997772829
0.4922048997772829 x 100 = 49.22%