403.03% is the change from 99 to 498
Calculation steps:
[( 498 - 99 ) ÷ 99] x 100 = 403.03%
Formula
Percentage change = [(498 - 99) / 99] x 100
Subtract the new number by the original number
498 - 99 = 399
399 ÷ 99 = 4.03030303030303
4.03030303030303 x 100 = 403.03%