8500% is the change from 9 to 774
Calculation steps:
[( 774 - 9 ) ÷ 9] x 100 = 8500%
Formula
Percentage change = [(774 - 9) / 9] x 100
Subtract the new number by the original number
774 - 9 = 765
765 ÷ 9 = 85
85 x 100 = 8500%
Example