-20.04% is the change from 519 to 415
Calculation steps:
[( 415 - 519 ) ÷ 519] x 100 = -20.04%
Formula
Percentage change = [(415 - 519) / 519] x 100
Subtract the new number by the original number
415 - 519 = -104
-104 ÷ 519 = -0.2003853564547206
-0.2003853564547206 x 100 = -20.04%