-0.25% is the change from 813 to 811
Calculation steps:
[( 811 - 813 ) ÷ 813] x 100 = -0.25%
Formula
Percentage change = [(811 - 813) / 813] x 100
Subtract the new number by the original number
811 - 813 = -2
-2 ÷ 813 = -0.0024600246002460025
-0.0024600246002460025 x 100 = -0.25%