-98.77% is the change from 978 to 12
Calculation steps:
[( 12 - 978 ) ÷ 978] x 100 = -98.77%
Formula
Percentage change = [(12 - 978) / 978] x 100
Subtract the new number by the original number
12 - 978 = -966
-966 ÷ 978 = -0.9877300613496932
-0.9877300613496932 x 100 = -98.77%