-94.22% is the change from 519 to 30
Calculation steps:
[( 30 - 519 ) ÷ 519] x 100 = -94.22%
Formula
Percentage change = [(30 - 519) / 519] x 100
Subtract the new number by the original number
30 - 519 = -489
-489 ÷ 519 = -0.9421965317919075
-0.9421965317919075 x 100 = -94.22%
Example