-0.49% is the change from 813 to 809
Calculation steps:
[( 809 - 813 ) ÷ 813] x 100 = -0.49%
Formula
Percentage change = [(809 - 813) / 813] x 100
Subtract the new number by the original number
809 - 813 = -4
-4 ÷ 813 = -0.004920049200492005
-0.004920049200492005 x 100 = -0.49%
Example