-69.71% is the change from 855 to 259
Calculation steps:
[( 259 - 855 ) ÷ 855] x 100 = -69.71%
Formula
Percentage change = [(259 - 855) / 855] x 100
Subtract the new number by the original number
259 - 855 = -596
-596 ÷ 855 = -0.6970760233918128
-0.6970760233918128 x 100 = -69.71%