-54.13% is the change from 521 to 239
Calculation steps:
[( 239 - 521 ) ÷ 521] x 100 = -54.13%
Formula
Percentage change = [(239 - 521) / 521] x 100
Subtract the new number by the original number
239 - 521 = -282
-282 ÷ 521 = -0.5412667946257198
-0.5412667946257198 x 100 = -54.13%