-9.93% is the change from 856 to 771
Calculation steps:
[( 771 - 856 ) ÷ 856] x 100 = -9.93%
Formula
Percentage change = [(771 - 856) / 856] x 100
Subtract the new number by the original number
771 - 856 = -85
-85 ÷ 856 = -0.09929906542056074
-0.09929906542056074 x 100 = -9.93%