-33.64% is the change from 978 to 649
Calculation steps:
[( 649 - 978 ) ÷ 978] x 100 = -33.64%
Formula
Percentage change = [(649 - 978) / 978] x 100
Subtract the new number by the original number
649 - 978 = -329
-329 ÷ 978 = -0.33640081799591004
-0.33640081799591004 x 100 = -33.64%