-49.69% is the change from 978 to 492
Calculation steps:
[( 492 - 978 ) ÷ 978] x 100 = -49.69%
Formula
Percentage change = [(492 - 978) / 978] x 100
Subtract the new number by the original number
492 - 978 = -486
-486 ÷ 978 = -0.49693251533742333
-0.49693251533742333 x 100 = -49.69%