0.5% is the change from 805 to 809
Calculation steps:
[( 809 - 805 ) ÷ 805] x 100 = 0.5%
Formula
Percentage change = [(809 - 805) / 805] x 100
Subtract the new number by the original number
809 - 805 = 4
4 ÷ 805 = 0.004968944099378882
0.004968944099378882 x 100 = 0.5%