-96.58% is the change from 439 to 15
Calculation steps:
[( 15 - 439 ) ÷ 439] x 100 = -96.58%
Formula
Percentage change = [(15 - 439) / 439] x 100
Subtract the new number by the original number
15 - 439 = -424
-424 ÷ 439 = -0.9658314350797267
-0.9658314350797267 x 100 = -96.58%