-52.34% is the change from 256 to 122
Calculation steps:
[( 122 - 256 ) ÷ 256] x 100 = -52.34%
Formula
Percentage change = [(122 - 256) / 256] x 100
Subtract the new number by the original number
122 - 256 = -134
-134 ÷ 256 = -0.5234375
-0.5234375 x 100 = -52.34%