6700% is the change from 9 to 612
Calculation steps:
[( 612 - 9 ) ÷ 9] x 100 = 6700%
Formula
Percentage change = [(612 - 9) / 9] x 100
Subtract the new number by the original number
612 - 9 = 603
603 ÷ 9 = 67
67 x 100 = 6700%
Example