-81.31% is the change from 519 to 97
Calculation steps:
[( 97 - 519 ) ÷ 519] x 100 = -81.31%
Formula
Percentage change = [(97 - 519) / 519] x 100
Subtract the new number by the original number
97 - 519 = -422
-422 ÷ 519 = -0.8131021194605009
-0.8131021194605009 x 100 = -81.31%