503.03% is the change from 99 to 597
Calculation steps:
[( 597 - 99 ) ÷ 99] x 100 = 503.03%
Formula
Percentage change = [(597 - 99) / 99] x 100
Subtract the new number by the original number
597 - 99 = 498
498 ÷ 99 = 5.03030303030303
5.03030303030303 x 100 = 503.03%