10.8% is the change from 815 to 903
Calculation steps:
[( 903 - 815 ) ÷ 815] x 100 = 10.8%
Formula
Percentage change = [(903 - 815) / 815] x 100
Subtract the new number by the original number
903 - 815 = 88
88 ÷ 815 = 0.10797546012269939
0.10797546012269939 x 100 = 10.8%