-29.45% is the change from 489 to 345
Calculation steps:
[( 345 - 489 ) ÷ 489] x 100 = -29.45%
Formula
Percentage change = [(345 - 489) / 489] x 100
Subtract the new number by the original number
345 - 489 = -144
-144 ÷ 489 = -0.294478527607362
-0.294478527607362 x 100 = -29.45%