900% is the change from 67 to 670
Calculation steps:
[( 670 - 67 ) ÷ 67] x 100 = 900%
Formula
Percentage change = [(670 - 67) / 67] x 100
Subtract the new number by the original number
670 - 67 = 603
603 ÷ 67 = 9
9 x 100 = 900%
Example