9700% is the change from 7 to 686
Calculation steps:
[( 686 - 7 ) ÷ 7] x 100 = 9700%
Formula
Percentage change = [(686 - 7) / 7] x 100
Subtract the new number by the original number
686 - 7 = 679
679 ÷ 7 = 97
97 x 100 = 9700%
Example