-98.37% is the change from 798 to 13
Calculation steps:
[( 13 - 798 ) ÷ 798] x 100 = -98.37%
Formula
Percentage change = [(13 - 798) / 798] x 100
Subtract the new number by the original number
13 - 798 = -785
-785 ÷ 798 = -0.9837092731829574
-0.9837092731829574 x 100 = -98.37%