8100% is the change from 8 to 656
Calculation steps:
[( 656 - 8 ) ÷ 8] x 100 = 8100%
Formula
Percentage change = [(656 - 8) / 8] x 100
Subtract the new number by the original number
656 - 8 = 648
648 ÷ 8 = 81
81 x 100 = 8100%
Example