9400% is the change from 9 to 855
Calculation steps:
[( 855 - 9 ) ÷ 9] x 100 = 9400%
Formula
Percentage change = [(855 - 9) / 9] x 100
Subtract the new number by the original number
855 - 9 = 846
846 ÷ 9 = 94
94 x 100 = 9400%
Example