-42.19% is the change from 256 to 148
Calculation steps:
[( 148 - 256 ) ÷ 256] x 100 = -42.19%
Formula
Percentage change = [(148 - 256) / 256] x 100
Subtract the new number by the original number
148 - 256 = -108
-108 ÷ 256 = -0.421875
-0.421875 x 100 = -42.19%