597.98% is the change from 99 to 691
Calculation steps:
[( 691 - 99 ) ÷ 99] x 100 = 597.98%
Formula
Percentage change = [(691 - 99) / 99] x 100
Subtract the new number by the original number
691 - 99 = 592
592 ÷ 99 = 5.97979797979798
5.97979797979798 x 100 = 597.98%