729.29% is the change from 99 to 821
Calculation steps:
[( 821 - 99 ) ÷ 99] x 100 = 729.29%
Formula
Percentage change = [(821 - 99) / 99] x 100
Subtract the new number by the original number
821 - 99 = 722
722 ÷ 99 = 7.292929292929293
7.292929292929293 x 100 = 729.29%