-3.28% is the change from 519 to 502
Calculation steps:
[( 502 - 519 ) ÷ 519] x 100 = -3.28%
Formula
Percentage change = [(502 - 519) / 519] x 100
Subtract the new number by the original number
502 - 519 = -17
-17 ÷ 519 = -0.03275529865125241
-0.03275529865125241 x 100 = -3.28%