-3.08% is the change from 519 to 503
Calculation steps:
[( 503 - 519 ) ÷ 519] x 100 = -3.08%
Formula
Percentage change = [(503 - 519) / 519] x 100
Subtract the new number by the original number
503 - 519 = -16
-16 ÷ 519 = -0.030828516377649325
-0.030828516377649325 x 100 = -3.08%