-91.82% is the change from 978 to 80
Calculation steps:
[( 80 - 978 ) ÷ 978] x 100 = -91.82%
Formula
Percentage change = [(80 - 978) / 978] x 100
Subtract the new number by the original number
80 - 978 = -898
-898 ÷ 978 = -0.918200408997955
-0.918200408997955 x 100 = -91.82%