308.08% is the change from 99 to 404
Calculation steps:
[( 404 - 99 ) ÷ 99] x 100 = 308.08%
Formula
Percentage change = [(404 - 99) / 99] x 100
Subtract the new number by the original number
404 - 99 = 305
305 ÷ 99 = 3.080808080808081
3.080808080808081 x 100 = 308.08%