-99.77% is the change from 856 to 2
Calculation steps:
[( 2 - 856 ) ÷ 856] x 100 = -99.77%
Formula
Percentage change = [(2 - 856) / 856] x 100
Subtract the new number by the original number
2 - 856 = -854
-854 ÷ 856 = -0.9976635514018691
-0.9976635514018691 x 100 = -99.77%