2300% is the change from 9 to 216
Calculation steps:
[( 216 - 9 ) ÷ 9] x 100 = 2300%
Formula
Percentage change = [(216 - 9) / 9] x 100
Subtract the new number by the original number
216 - 9 = 207
207 ÷ 9 = 23
23 x 100 = 2300%
Example