8455.56% is the change from 9 to 770
Calculation steps:
[( 770 - 9 ) ÷ 9] x 100 = 8455.56%
Formula
Percentage change = [(770 - 9) / 9] x 100
Subtract the new number by the original number
770 - 9 = 761
761 ÷ 9 = 84.55555555555556
84.55555555555556 x 100 = 8455.56%