2600% is the change from 9 to 243
Calculation steps:
[( 243 - 9 ) ÷ 9] x 100 = 2600%
Formula
Percentage change = [(243 - 9) / 9] x 100
Subtract the new number by the original number
243 - 9 = 234
234 ÷ 9 = 26
26 x 100 = 2600%
Example