43.21% is the change from 449 to 643
Calculation steps:
[( 643 - 449 ) ÷ 449] x 100 = 43.21%
Formula
Percentage change = [(643 - 449) / 449] x 100
Subtract the new number by the original number
643 - 449 = 194
194 ÷ 449 = 0.43207126948775054
0.43207126948775054 x 100 = 43.21%