9400% is the change from 7 to 665
Calculation steps:
[( 665 - 7 ) ÷ 7] x 100 = 9400%
Formula
Percentage change = [(665 - 7) / 7] x 100
Subtract the new number by the original number
665 - 7 = 658
658 ÷ 7 = 94
94 x 100 = 9400%
Example