2688.89% is the change from 9 to 251
Calculation steps:
[( 251 - 9 ) ÷ 9] x 100 = 2688.89%
Formula
Percentage change = [(251 - 9) / 9] x 100
Subtract the new number by the original number
251 - 9 = 242
242 ÷ 9 = 26.88888888888889
26.88888888888889 x 100 = 2688.89%