-56.11% is the change from 581 to 255
Calculation steps:
[( 255 - 581 ) ÷ 581] x 100 = -56.11%
Formula
Percentage change = [(255 - 581) / 581] x 100
Subtract the new number by the original number
255 - 581 = -326
-326 ÷ 581 = -0.5611015490533563
-0.5611015490533563 x 100 = -56.11%