-23.05% is the change from 256 to 197
Calculation steps:
[( 197 - 256 ) ÷ 256] x 100 = -23.05%
Formula
Percentage change = [(197 - 256) / 256] x 100
Subtract the new number by the original number
197 - 256 = -59
-59 ÷ 256 = -0.23046875
-0.23046875 x 100 = -23.05%