-72.26% is the change from 923 to 256
Calculation steps:
[( 256 - 923 ) ÷ 923] x 100 = -72.26%
Formula
Percentage change = [(256 - 923) / 923] x 100
Subtract the new number by the original number
256 - 923 = -667
-667 ÷ 923 = -0.7226435536294691
-0.7226435536294691 x 100 = -72.26%