-10.94% is the change from 256 to 228
Calculation steps:
[( 228 - 256 ) ÷ 256] x 100 = -10.94%
Formula
Percentage change = [(228 - 256) / 256] x 100
Subtract the new number by the original number
228 - 256 = -28
-28 ÷ 256 = -0.109375
-0.109375 x 100 = -10.94%