7662.5% is the change from 8 to 621
Calculation steps:
[( 621 - 8 ) ÷ 8] x 100 = 7662.5%
Formula
Percentage change = [(621 - 8) / 8] x 100
Subtract the new number by the original number
621 - 8 = 613
613 ÷ 8 = 76.625
76.625 x 100 = 7662.5%
Example