-51.42% is the change from 529 to 257
Calculation steps:
[( 257 - 529 ) ÷ 529] x 100 = -51.42%
Formula
Percentage change = [(257 - 529) / 529] x 100
Subtract the new number by the original number
257 - 529 = -272
-272 ÷ 529 = -0.5141776937618148
-0.5141776937618148 x 100 = -51.42%