9011.11% is the change from 9 to 820
Calculation steps:
[( 820 - 9 ) ÷ 9] x 100 = 9011.11%
Formula
Percentage change = [(820 - 9) / 9] x 100
Subtract the new number by the original number
820 - 9 = 811
811 ÷ 9 = 90.11111111111111
90.11111111111111 x 100 = 9011.11%