0.5% is the change from 800 to 804
Calculation steps:
[( 804 - 800 ) ÷ 800] x 100 = 0.5%
Formula
Percentage change = [(804 - 800) / 800] x 100
Subtract the new number by the original number
804 - 800 = 4
4 ÷ 800 = 0.005
0.005 x 100 = 0.5%
Example