-68.93% is the change from 856 to 266
Calculation steps:
[( 266 - 856 ) ÷ 856] x 100 = -68.93%
Formula
Percentage change = [(266 - 856) / 856] x 100
Subtract the new number by the original number
266 - 856 = -590
-590 ÷ 856 = -0.6892523364485982
-0.6892523364485982 x 100 = -68.93%