402.02% is the change from 99 to 497
Calculation steps:
[( 497 - 99 ) ÷ 99] x 100 = 402.02%
Formula
Percentage change = [(497 - 99) / 99] x 100
Subtract the new number by the original number
497 - 99 = 398
398 ÷ 99 = 4.02020202020202
4.02020202020202 x 100 = 402.02%