9328.57% is the change from 7 to 660
Calculation steps:
[( 660 - 7 ) ÷ 7] x 100 = 9328.57%
Formula
Percentage change = [(660 - 7) / 7] x 100
Subtract the new number by the original number
660 - 7 = 653
653 ÷ 7 = 93.28571428571429
93.28571428571429 x 100 = 9328.57%