80900% is the change from 1 to 810
Calculation steps:
[( 810 - 1 ) ÷ 1] x 100 = 80900%
Formula
Percentage change = [(810 - 1) / 1] x 100
Subtract the new number by the original number
810 - 1 = 809
809 ÷ 1 = 809
809 x 100 = 80900%
Example