9142.86% is the change from 7 to 647
Calculation steps:
[( 647 - 7 ) ÷ 7] x 100 = 9142.86%
Formula
Percentage change = [(647 - 7) / 7] x 100
Subtract the new number by the original number
647 - 7 = 640
640 ÷ 7 = 91.42857142857143
91.42857142857143 x 100 = 9142.86%