13.63% is the change from 800 to 909
Calculation steps:
[( 909 - 800 ) ÷ 800] x 100 = 13.63%
Formula
Percentage change = [(909 - 800) / 800] x 100
Subtract the new number by the original number
909 - 800 = 109
109 ÷ 800 = 0.13625
0.13625 x 100 = 13.63%