-3.82% is the change from 811 to 780
Calculation steps:
[( 780 - 811 ) ÷ 811] x 100 = -3.82%
Formula
Percentage change = [(780 - 811) / 811] x 100
Subtract the new number by the original number
780 - 811 = -31
-31 ÷ 811 = -0.03822441430332922
-0.03822441430332922 x 100 = -3.82%