-96.83% is the change from 978 to 31
Calculation steps:
[( 31 - 978 ) ÷ 978] x 100 = -96.83%
Formula
Percentage change = [(31 - 978) / 978] x 100
Subtract the new number by the original number
31 - 978 = -947
-947 ÷ 978 = -0.9683026584867076
-0.9683026584867076 x 100 = -96.83%