517.17% is the change from 99 to 611
Calculation steps:
[( 611 - 99 ) ÷ 99] x 100 = 517.17%
Formula
Percentage change = [(611 - 99) / 99] x 100
Subtract the new number by the original number
611 - 99 = 512
512 ÷ 99 = 5.171717171717172
5.171717171717172 x 100 = 517.17%