-98.5% is the change from 798 to 12
Calculation steps:
[( 12 - 798 ) ÷ 798] x 100 = -98.5%
Formula
Percentage change = [(12 - 798) / 798] x 100
Subtract the new number by the original number
12 - 798 = -786
-786 ÷ 798 = -0.9849624060150376
-0.9849624060150376 x 100 = -98.5%