511.11% is the change from 99 to 605
Calculation steps:
[( 605 - 99 ) ÷ 99] x 100 = 511.11%
Formula
Percentage change = [(605 - 99) / 99] x 100
Subtract the new number by the original number
605 - 99 = 506
506 ÷ 99 = 5.111111111111111
5.111111111111111 x 100 = 511.11%