763.75% is the change from 80 to 691
Calculation steps:
[( 691 - 80 ) ÷ 80] x 100 = 763.75%
Formula
Percentage change = [(691 - 80) / 80] x 100
Subtract the new number by the original number
691 - 80 = 611
611 ÷ 80 = 7.6375
7.6375 x 100 = 763.75%
Example