-98.89% is the change from 808 to 9
Calculation steps:
[( 9 - 808 ) ÷ 808] x 100 = -98.89%
Formula
Percentage change = [(9 - 808) / 808] x 100
Subtract the new number by the original number
9 - 808 = -799
-799 ÷ 808 = -0.9888613861386139
-0.9888613861386139 x 100 = -98.89%