2500% is the change from 9 to 234
Calculation steps:
[( 234 - 9 ) ÷ 9] x 100 = 2500%
Formula
Percentage change = [(234 - 9) / 9] x 100
Subtract the new number by the original number
234 - 9 = 225
225 ÷ 9 = 25
25 x 100 = 2500%
Example