7277.78% is the change from 9 to 664
Calculation steps:
[( 664 - 9 ) ÷ 9] x 100 = 7277.78%
Formula
Percentage change = [(664 - 9) / 9] x 100
Subtract the new number by the original number
664 - 9 = 655
655 ÷ 9 = 72.77777777777777
72.77777777777777 x 100 = 7277.78%