9485.71% is the change from 7 to 671
Calculation steps:
[( 671 - 7 ) ÷ 7] x 100 = 9485.71%
Formula
Percentage change = [(671 - 7) / 7] x 100
Subtract the new number by the original number
671 - 7 = 664
664 ÷ 7 = 94.85714285714286
94.85714285714286 x 100 = 9485.71%