-19.12% is the change from 999 to 808
Calculation steps:
[( 808 - 999 ) ÷ 999] x 100 = -19.12%
Formula
Percentage change = [(808 - 999) / 999] x 100
Subtract the new number by the original number
808 - 999 = -191
-191 ÷ 999 = -0.19119119119119118
-0.19119119119119118 x 100 = -19.12%