-97.27% is the change from 330 to 9
Calculation steps:
[( 9 - 330 ) ÷ 330] x 100 = -97.27%
Formula
Percentage change = [(9 - 330) / 330] x 100
Subtract the new number by the original number
9 - 330 = -321
-321 ÷ 330 = -0.9727272727272728
-0.9727272727272728 x 100 = -97.27%