-51.84% is the change from 517 to 249
Calculation steps:
[( 249 - 517 ) ÷ 517] x 100 = -51.84%
Formula
Percentage change = [(249 - 517) / 517] x 100
Subtract the new number by the original number
249 - 517 = -268
-268 ÷ 517 = -0.5183752417794971
-0.5183752417794971 x 100 = -51.84%