-27.34% is the change from 256 to 186
Calculation steps:
[( 186 - 256 ) ÷ 256] x 100 = -27.34%
Formula
Percentage change = [(186 - 256) / 256] x 100
Subtract the new number by the original number
186 - 256 = -70
-70 ÷ 256 = -0.2734375
-0.2734375 x 100 = -27.34%