-25.78% is the change from 256 to 190
Calculation steps:
[( 190 - 256 ) ÷ 256] x 100 = -25.78%
Formula
Percentage change = [(190 - 256) / 256] x 100
Subtract the new number by the original number
190 - 256 = -66
-66 ÷ 256 = -0.2578125
-0.2578125 x 100 = -25.78%