6600% is the change from 9 to 603
Calculation steps:
[( 603 - 9 ) ÷ 9] x 100 = 6600%
Formula
Percentage change = [(603 - 9) / 9] x 100
Subtract the new number by the original number
603 - 9 = 594
594 ÷ 9 = 66
66 x 100 = 6600%
Example