829.29% is the change from 99 to 920
Calculation steps:
[( 920 - 99 ) ÷ 99] x 100 = 829.29%
Formula
Percentage change = [(920 - 99) / 99] x 100
Subtract the new number by the original number
920 - 99 = 821
821 ÷ 99 = 8.292929292929292
8.292929292929292 x 100 = 829.29%