-98.69% is the change from 993 to 13
Calculation steps:
[( 13 - 993 ) ÷ 993] x 100 = -98.69%
Formula
Percentage change = [(13 - 993) / 993] x 100
Subtract the new number by the original number
13 - 993 = -980
-980 ÷ 993 = -0.9869083585095669
-0.9869083585095669 x 100 = -98.69%