-51.8% is the change from 529 to 255
Calculation steps:
[( 255 - 529 ) ÷ 529] x 100 = -51.8%
Formula
Percentage change = [(255 - 529) / 529] x 100
Subtract the new number by the original number
255 - 529 = -274
-274 ÷ 529 = -0.5179584120982986
-0.5179584120982986 x 100 = -51.8%