-84.97% is the change from 978 to 147
Calculation steps:
[( 147 - 978 ) ÷ 978] x 100 = -84.97%
Formula
Percentage change = [(147 - 978) / 978] x 100
Subtract the new number by the original number
147 - 978 = -831
-831 ÷ 978 = -0.8496932515337423
-0.8496932515337423 x 100 = -84.97%