-96.15% is the change from 519 to 20
Calculation steps:
[( 20 - 519 ) ÷ 519] x 100 = -96.15%
Formula
Percentage change = [(20 - 519) / 519] x 100
Subtract the new number by the original number
20 - 519 = -499
-499 ÷ 519 = -0.9614643545279383
-0.9614643545279383 x 100 = -96.15%