4333.33% is the change from 9 to 399
Calculation steps:
[( 399 - 9 ) ÷ 9] x 100 = 4333.33%
Formula
Percentage change = [(399 - 9) / 9] x 100
Subtract the new number by the original number
399 - 9 = 390
390 ÷ 9 = 43.333333333333336
43.333333333333336 x 100 = 4333.33%