-88.67% is the change from 256 to 29
Calculation steps:
[( 29 - 256 ) ÷ 256] x 100 = -88.67%
Formula
Percentage change = [(29 - 256) / 256] x 100
Subtract the new number by the original number
29 - 256 = -227
-227 ÷ 256 = -0.88671875
-0.88671875 x 100 = -88.67%