676.25% is the change from 80 to 621
Calculation steps:
[( 621 - 80 ) ÷ 80] x 100 = 676.25%
Formula
Percentage change = [(621 - 80) / 80] x 100
Subtract the new number by the original number
621 - 80 = 541
541 ÷ 80 = 6.7625
6.7625 x 100 = 676.25%
Example