-96.42% is the change from 419 to 15
Calculation steps:
[( 15 - 419 ) ÷ 419] x 100 = -96.42%
Formula
Percentage change = [(15 - 419) / 419] x 100
Subtract the new number by the original number
15 - 419 = -404
-404 ÷ 419 = -0.964200477326969
-0.964200477326969 x 100 = -96.42%