-0.25% is the change from 816 to 814
Calculation steps:
[( 814 - 816 ) ÷ 816] x 100 = -0.25%
Formula
Percentage change = [(814 - 816) / 816] x 100
Subtract the new number by the original number
814 - 816 = -2
-2 ÷ 816 = -0.0024509803921568627
-0.0024509803921568627 x 100 = -0.25%