8225% is the change from 12 to 999
Calculation steps:
[( 999 - 12 ) ÷ 12] x 100 = 8225%
Formula
Percentage change = [(999 - 12) / 12] x 100
Subtract the new number by the original number
999 - 12 = 987
987 ÷ 12 = 82.25
82.25 x 100 = 8225%
Example