-3.42% is the change from 439 to 424
Calculation steps:
[( 424 - 439 ) ÷ 439] x 100 = -3.42%
Formula
Percentage change = [(424 - 439) / 439] x 100
Subtract the new number by the original number
424 - 439 = -15
-15 ÷ 439 = -0.03416856492027335
-0.03416856492027335 x 100 = -3.42%