-1.7% is the change from 823 to 809
Calculation steps:
[( 809 - 823 ) ÷ 823] x 100 = -1.7%
Formula
Percentage change = [(809 - 823) / 823] x 100
Subtract the new number by the original number
809 - 823 = -14
-14 ÷ 823 = -0.01701093560145808
-0.01701093560145808 x 100 = -1.7%