-51.24% is the change from 523 to 255
Calculation steps:
[( 255 - 523 ) ÷ 523] x 100 = -51.24%
Formula
Percentage change = [(255 - 523) / 523] x 100
Subtract the new number by the original number
255 - 523 = -268
-268 ÷ 523 = -0.5124282982791587
-0.5124282982791587 x 100 = -51.24%