-3.23% is the change from 806 to 780
Calculation steps:
[( 780 - 806 ) ÷ 806] x 100 = -3.23%
Formula
Percentage change = [(780 - 806) / 806] x 100
Subtract the new number by the original number
780 - 806 = -26
-26 ÷ 806 = -0.03225806451612903
-0.03225806451612903 x 100 = -3.23%