3500% is the change from 9 to 324
Calculation steps:
[( 324 - 9 ) ÷ 9] x 100 = 3500%
Formula
Percentage change = [(324 - 9) / 9] x 100
Subtract the new number by the original number
324 - 9 = 315
315 ÷ 9 = 35
35 x 100 = 3500%
Example