-19.14% is the change from 256 to 207
Calculation steps:
[( 207 - 256 ) ÷ 256] x 100 = -19.14%
Formula
Percentage change = [(207 - 256) / 256] x 100
Subtract the new number by the original number
207 - 256 = -49
-49 ÷ 256 = -0.19140625
-0.19140625 x 100 = -19.14%