917.5% is the change from 80 to 814
Calculation steps:
[( 814 - 80 ) ÷ 80] x 100 = 917.5%
Formula
Percentage change = [(814 - 80) / 80] x 100
Subtract the new number by the original number
814 - 80 = 734
734 ÷ 80 = 9.175
9.175 x 100 = 917.5%
Example