398.99% is the change from 99 to 494
Calculation steps:
[( 494 - 99 ) ÷ 99] x 100 = 398.99%
Formula
Percentage change = [(494 - 99) / 99] x 100
Subtract the new number by the original number
494 - 99 = 395
395 ÷ 99 = 3.98989898989899
3.98989898989899 x 100 = 398.99%