-89.06% is the change from 256 to 28
Calculation steps:
[( 28 - 256 ) ÷ 256] x 100 = -89.06%
Formula
Percentage change = [(28 - 256) / 256] x 100
Subtract the new number by the original number
28 - 256 = -228
-228 ÷ 256 = -0.890625
-0.890625 x 100 = -89.06%