42.98% is the change from 449 to 642
Calculation steps:
[( 642 - 449 ) ÷ 449] x 100 = 42.98%
Formula
Percentage change = [(642 - 449) / 449] x 100
Subtract the new number by the original number
642 - 449 = 193
193 ÷ 449 = 0.4298440979955457
0.4298440979955457 x 100 = 42.98%