-50.96% is the change from 522 to 256
Calculation steps:
[( 256 - 522 ) ÷ 522] x 100 = -50.96%
Formula
Percentage change = [(256 - 522) / 522] x 100
Subtract the new number by the original number
256 - 522 = -266
-266 ÷ 522 = -0.5095785440613027
-0.5095785440613027 x 100 = -50.96%