-30.67% is the change from 489 to 339
Calculation steps:
[( 339 - 489 ) ÷ 489] x 100 = -30.67%
Formula
Percentage change = [(339 - 489) / 489] x 100
Subtract the new number by the original number
339 - 489 = -150
-150 ÷ 489 = -0.3067484662576687
-0.3067484662576687 x 100 = -30.67%