-85.93% is the change from 519 to 73
Calculation steps:
[( 73 - 519 ) ÷ 519] x 100 = -85.93%
Formula
Percentage change = [(73 - 519) / 519] x 100
Subtract the new number by the original number
73 - 519 = -446
-446 ÷ 519 = -0.859344894026975
-0.859344894026975 x 100 = -85.93%