3122.22% is the change from 9 to 290
Calculation steps:
[( 290 - 9 ) ÷ 9] x 100 = 3122.22%
Formula
Percentage change = [(290 - 9) / 9] x 100
Subtract the new number by the original number
290 - 9 = 281
281 ÷ 9 = 31.22222222222222
31.22222222222222 x 100 = 3122.22%