-45.31% is the change from 256 to 140
Calculation steps:
[( 140 - 256 ) ÷ 256] x 100 = -45.31%
Formula
Percentage change = [(140 - 256) / 256] x 100
Subtract the new number by the original number
140 - 256 = -116
-116 ÷ 256 = -0.453125
-0.453125 x 100 = -45.31%