455.56% is the change from 99 to 550
Calculation steps:
[( 550 - 99 ) ÷ 99] x 100 = 455.56%
Formula
Percentage change = [(550 - 99) / 99] x 100
Subtract the new number by the original number
550 - 99 = 451
451 ÷ 99 = 4.555555555555555
4.555555555555555 x 100 = 455.56%