12.88% is the change from 800 to 903
Calculation steps:
[( 903 - 800 ) ÷ 800] x 100 = 12.88%
Formula
Percentage change = [(903 - 800) / 800] x 100
Subtract the new number by the original number
903 - 800 = 103
103 ÷ 800 = 0.12875
0.12875 x 100 = 12.88%