-30.06% is the change from 489 to 342
Calculation steps:
[( 342 - 489 ) ÷ 489] x 100 = -30.06%
Formula
Percentage change = [(342 - 489) / 489] x 100
Subtract the new number by the original number
342 - 489 = -147
-147 ÷ 489 = -0.3006134969325153
-0.3006134969325153 x 100 = -30.06%