404.04% is the change from 99 to 499
Calculation steps:
[( 499 - 99 ) ÷ 99] x 100 = 404.04%
Formula
Percentage change = [(499 - 99) / 99] x 100
Subtract the new number by the original number
499 - 99 = 400
400 ÷ 99 = 4.040404040404041
4.040404040404041 x 100 = 404.04%