-98.64% is the change from 809 to 11
Calculation steps:
[( 11 - 809 ) ÷ 809] x 100 = -98.64%
Formula
Percentage change = [(11 - 809) / 809] x 100
Subtract the new number by the original number
11 - 809 = -798
-798 ÷ 809 = -0.9864029666254636
-0.9864029666254636 x 100 = -98.64%