507.07% is the change from 99 to 601
Calculation steps:
[( 601 - 99 ) ÷ 99] x 100 = 507.07%
Formula
Percentage change = [(601 - 99) / 99] x 100
Subtract the new number by the original number
601 - 99 = 502
502 ÷ 99 = 5.070707070707071
5.070707070707071 x 100 = 507.07%