-22.1% is the change from 439 to 342
Calculation steps:
[( 342 - 439 ) ÷ 439] x 100 = -22.1%
Formula
Percentage change = [(342 - 439) / 439] x 100
Subtract the new number by the original number
342 - 439 = -97
-97 ÷ 439 = -0.22095671981776766
-0.22095671981776766 x 100 = -22.1%