-22.27% is the change from 256 to 199
Calculation steps:
[( 199 - 256 ) ÷ 256] x 100 = -22.27%
Formula
Percentage change = [(199 - 256) / 256] x 100
Subtract the new number by the original number
199 - 256 = -57
-57 ÷ 256 = -0.22265625
-0.22265625 x 100 = -22.27%