81800% is the change from 1 to 819
Calculation steps:
[( 819 - 1 ) ÷ 1] x 100 = 81800%
Formula
Percentage change = [(819 - 1) / 1] x 100
Subtract the new number by the original number
819 - 1 = 818
818 ÷ 1 = 818
818 x 100 = 81800%
Example