9.99% is the change from 821 to 903
Calculation steps:
[( 903 - 821 ) ÷ 821] x 100 = 9.99%
Formula
Percentage change = [(903 - 821) / 821] x 100
Subtract the new number by the original number
903 - 821 = 82
82 ÷ 821 = 0.09987819732034105
0.09987819732034105 x 100 = 9.99%