747.5% is the change from 80 to 678
Calculation steps:
[( 678 - 80 ) ÷ 80] x 100 = 747.5%
Formula
Percentage change = [(678 - 80) / 80] x 100
Subtract the new number by the original number
678 - 80 = 598
598 ÷ 80 = 7.475
7.475 x 100 = 747.5%
Example