-98.48% is the change from 857 to 13
Calculation steps:
[( 13 - 857 ) ÷ 857] x 100 = -98.48%
Formula
Percentage change = [(13 - 857) / 857] x 100
Subtract the new number by the original number
13 - 857 = -844
-844 ÷ 857 = -0.9848308051341891
-0.9848308051341891 x 100 = -98.48%