8400% is the change from 9 to 765
Calculation steps:
[( 765 - 9 ) ÷ 9] x 100 = 8400%
Formula
Percentage change = [(765 - 9) / 9] x 100
Subtract the new number by the original number
765 - 9 = 756
756 ÷ 9 = 84
84 x 100 = 8400%
Example