122.49% is the change from 449 to 999
Calculation steps:
[( 999 - 449 ) ÷ 449] x 100 = 122.49%
Formula
Percentage change = [(999 - 449) / 449] x 100
Subtract the new number by the original number
999 - 449 = 550
550 ÷ 449 = 1.2249443207126949
1.2249443207126949 x 100 = 122.49%