-98.52% is the change from 809 to 12
Calculation steps:
[( 12 - 809 ) ÷ 809] x 100 = -98.52%
Formula
Percentage change = [(12 - 809) / 809] x 100
Subtract the new number by the original number
12 - 809 = -797
-797 ÷ 809 = -0.9851668726823238
-0.9851668726823238 x 100 = -98.52%