7200% is the change from 9 to 657
Calculation steps:
[( 657 - 9 ) ÷ 9] x 100 = 7200%
Formula
Percentage change = [(657 - 9) / 9] x 100
Subtract the new number by the original number
657 - 9 = 648
648 ÷ 9 = 72
72 x 100 = 7200%
Example