81500% is the change from 1 to 816
Calculation steps:
[( 816 - 1 ) ÷ 1] x 100 = 81500%
Formula
Percentage change = [(816 - 1) / 1] x 100
Subtract the new number by the original number
816 - 1 = 815
815 ÷ 1 = 815
815 x 100 = 81500%
Example