-9.54% is the change from 283 to 256
Calculation steps:
[( 256 - 283 ) ÷ 283] x 100 = -9.54%
Formula
Percentage change = [(256 - 283) / 283] x 100
Subtract the new number by the original number
256 - 283 = -27
-27 ÷ 283 = -0.09540636042402827
-0.09540636042402827 x 100 = -9.54%