-85.16% is the change from 256 to 38
Calculation steps:
[( 38 - 256 ) ÷ 256] x 100 = -85.16%
Formula
Percentage change = [(38 - 256) / 256] x 100
Subtract the new number by the original number
38 - 256 = -218
-218 ÷ 256 = -0.8515625
-0.8515625 x 100 = -85.16%