-50.41% is the change from 978 to 485
Calculation steps:
[( 485 - 978 ) ÷ 978] x 100 = -50.41%
Formula
Percentage change = [(485 - 978) / 978] x 100
Subtract the new number by the original number
485 - 978 = -493
-493 ÷ 978 = -0.5040899795501023
-0.5040899795501023 x 100 = -50.41%