79900% is the change from 1 to 800
Calculation steps:
[( 800 - 1 ) ÷ 1] x 100 = 79900%
Formula
Percentage change = [(800 - 1) / 1] x 100
Subtract the new number by the original number
800 - 1 = 799
799 ÷ 1 = 799
799 x 100 = 79900%
Example