-56.75% is the change from 978 to 423
Calculation steps:
[( 423 - 978 ) ÷ 978] x 100 = -56.75%
Formula
Percentage change = [(423 - 978) / 978] x 100
Subtract the new number by the original number
423 - 978 = -555
-555 ÷ 978 = -0.5674846625766872
-0.5674846625766872 x 100 = -56.75%