-2.31% is the change from 519 to 507
Calculation steps:
[( 507 - 519 ) ÷ 519] x 100 = -2.31%
Formula
Percentage change = [(507 - 519) / 519] x 100
Subtract the new number by the original number
507 - 519 = -12
-12 ÷ 519 = -0.023121387283236993
-0.023121387283236993 x 100 = -2.31%