-98.44% is the change from 256 to 4
Calculation steps:
[( 4 - 256 ) ÷ 256] x 100 = -98.44%
Formula
Percentage change = [(4 - 256) / 256] x 100
Subtract the new number by the original number
4 - 256 = -252
-252 ÷ 256 = -0.984375
-0.984375 x 100 = -98.44%