-98.49% is the change from 861 to 13
Calculation steps:
[( 13 - 861 ) ÷ 861] x 100 = -98.49%
Formula
Percentage change = [(13 - 861) / 861] x 100
Subtract the new number by the original number
13 - 861 = -848
-848 ÷ 861 = -0.9849012775842044
-0.9849012775842044 x 100 = -98.49%