8225% is the change from 8 to 666
Calculation steps:
[( 666 - 8 ) ÷ 8] x 100 = 8225%
Formula
Percentage change = [(666 - 8) / 8] x 100
Subtract the new number by the original number
666 - 8 = 658
658 ÷ 8 = 82.25
82.25 x 100 = 8225%
Example