728.28% is the change from 99 to 820
Calculation steps:
[( 820 - 99 ) ÷ 99] x 100 = 728.28%
Formula
Percentage change = [(820 - 99) / 99] x 100
Subtract the new number by the original number
820 - 99 = 721
721 ÷ 99 = 7.282828282828283
7.282828282828283 x 100 = 728.28%