9385.71% is the change from 7 to 664
Calculation steps:
[( 664 - 7 ) ÷ 7] x 100 = 9385.71%
Formula
Percentage change = [(664 - 7) / 7] x 100
Subtract the new number by the original number
664 - 7 = 657
657 ÷ 7 = 93.85714285714286
93.85714285714286 x 100 = 9385.71%