9022.22% is the change from 9 to 821
Calculation steps:
[( 821 - 9 ) ÷ 9] x 100 = 9022.22%
Formula
Percentage change = [(821 - 9) / 9] x 100
Subtract the new number by the original number
821 - 9 = 812
812 ÷ 9 = 90.22222222222223
90.22222222222223 x 100 = 9022.22%