-98.41% is the change from 817 to 13
Calculation steps:
[( 13 - 817 ) ÷ 817] x 100 = -98.41%
Formula
Percentage change = [(13 - 817) / 817] x 100
Subtract the new number by the original number
13 - 817 = -804
-804 ÷ 817 = -0.9840881272949816
-0.9840881272949816 x 100 = -98.41%