-60.12% is the change from 978 to 390
Calculation steps:
[( 390 - 978 ) ÷ 978] x 100 = -60.12%
Formula
Percentage change = [(390 - 978) / 978] x 100
Subtract the new number by the original number
390 - 978 = -588
-588 ÷ 978 = -0.6012269938650306
-0.6012269938650306 x 100 = -60.12%