9% is the change from 800 to 872
Calculation steps:
[( 872 - 800 ) ÷ 800] x 100 = 9%
Formula
Percentage change = [(872 - 800) / 800] x 100
Subtract the new number by the original number
872 - 800 = 72
72 ÷ 800 = 0.09
0.09 x 100 = 9%
Example