673.74% is the change from 99 to 766
Calculation steps:
[( 766 - 99 ) ÷ 99] x 100 = 673.74%
Formula
Percentage change = [(766 - 99) / 99] x 100
Subtract the new number by the original number
766 - 99 = 667
667 ÷ 99 = 6.737373737373737
6.737373737373737 x 100 = 673.74%