42.09% is the change from 449 to 638
Calculation steps:
[( 638 - 449 ) ÷ 449] x 100 = 42.09%
Formula
Percentage change = [(638 - 449) / 449] x 100
Subtract the new number by the original number
638 - 449 = 189
189 ÷ 449 = 0.4209354120267261
0.4209354120267261 x 100 = 42.09%