-82.66% is the change from 519 to 90
Calculation steps:
[( 90 - 519 ) ÷ 519] x 100 = -82.66%
Formula
Percentage change = [(90 - 519) / 519] x 100
Subtract the new number by the original number
90 - 519 = -429
-429 ÷ 519 = -0.8265895953757225
-0.8265895953757225 x 100 = -82.66%