-49.59% is the change from 978 to 493
Calculation steps:
[( 493 - 978 ) ÷ 978] x 100 = -49.59%
Formula
Percentage change = [(493 - 978) / 978] x 100
Subtract the new number by the original number
493 - 978 = -485
-485 ÷ 978 = -0.49591002044989774
-0.49591002044989774 x 100 = -49.59%