-98.67% is the change from 978 to 13
Calculation steps:
[( 13 - 978 ) ÷ 978] x 100 = -98.67%
Formula
Percentage change = [(13 - 978) / 978] x 100
Subtract the new number by the original number
13 - 978 = -965
-965 ÷ 978 = -0.9867075664621677
-0.9867075664621677 x 100 = -98.67%