-98.52% is the change from 879 to 13
Calculation steps:
[( 13 - 879 ) ÷ 879] x 100 = -98.52%
Formula
Percentage change = [(13 - 879) / 879] x 100
Subtract the new number by the original number
13 - 879 = -866
-866 ÷ 879 = -0.9852104664391353
-0.9852104664391353 x 100 = -98.52%