-48.36% is the change from 978 to 505
Calculation steps:
[( 505 - 978 ) ÷ 978] x 100 = -48.36%
Formula
Percentage change = [(505 - 978) / 978] x 100
Subtract the new number by the original number
505 - 978 = -473
-473 ÷ 978 = -0.483640081799591
-0.483640081799591 x 100 = -48.36%