-98.67% is the change from 979 to 13
Calculation steps:
[( 13 - 979 ) ÷ 979] x 100 = -98.67%
Formula
Percentage change = [(13 - 979) / 979] x 100
Subtract the new number by the original number
13 - 979 = -966
-966 ÷ 979 = -0.9867211440245148
-0.9867211440245148 x 100 = -98.67%