-33.74% is the change from 489 to 324
Calculation steps:
[( 324 - 489 ) ÷ 489] x 100 = -33.74%
Formula
Percentage change = [(324 - 489) / 489] x 100
Subtract the new number by the original number
324 - 489 = -165
-165 ÷ 489 = -0.3374233128834356
-0.3374233128834356 x 100 = -33.74%