-21.54% is the change from 325 to 255
Calculation steps:
[( 255 - 325 ) ÷ 325] x 100 = -21.54%
Formula
Percentage change = [(255 - 325) / 325] x 100
Subtract the new number by the original number
255 - 325 = -70
-70 ÷ 325 = -0.2153846153846154
-0.2153846153846154 x 100 = -21.54%