-98.12% is the change from 798 to 15
Calculation steps:
[( 15 - 798 ) ÷ 798] x 100 = -98.12%
Formula
Percentage change = [(15 - 798) / 798] x 100
Subtract the new number by the original number
15 - 798 = -783
-783 ÷ 798 = -0.981203007518797
-0.981203007518797 x 100 = -98.12%