353.54% is the change from 99 to 449
Calculation steps:
[( 449 - 99 ) ÷ 99] x 100 = 353.54%
Formula
Percentage change = [(449 - 99) / 99] x 100
Subtract the new number by the original number
449 - 99 = 350
350 ÷ 99 = 3.5353535353535355
3.5353535353535355 x 100 = 353.54%