810% is the change from 80 to 728
Calculation steps:
[( 728 - 80 ) ÷ 80] x 100 = 810%
Formula
Percentage change = [(728 - 80) / 80] x 100
Subtract the new number by the original number
728 - 80 = 648
648 ÷ 80 = 8.1
8.1 x 100 = 810%
Example