-80.35% is the change from 519 to 102
Calculation steps:
[( 102 - 519 ) ÷ 519] x 100 = -80.35%
Formula
Percentage change = [(102 - 519) / 519] x 100
Subtract the new number by the original number
102 - 519 = -417
-417 ÷ 519 = -0.8034682080924855
-0.8034682080924855 x 100 = -80.35%