-1.58% is the change from 823 to 810
Calculation steps:
[( 810 - 823 ) ÷ 823] x 100 = -1.58%
Formula
Percentage change = [(810 - 823) / 823] x 100
Subtract the new number by the original number
810 - 823 = -13
-13 ÷ 823 = -0.015795868772782502
-0.015795868772782502 x 100 = -1.58%