-21.23% is the change from 325 to 256
Calculation steps:
[( 256 - 325 ) ÷ 325] x 100 = -21.23%
Formula
Percentage change = [(256 - 325) / 325] x 100
Subtract the new number by the original number
256 - 325 = -69
-69 ÷ 325 = -0.2123076923076923
-0.2123076923076923 x 100 = -21.23%