-20.45% is the change from 978 to 778
Calculation steps:
[( 778 - 978 ) ÷ 978] x 100 = -20.45%
Formula
Percentage change = [(778 - 978) / 978] x 100
Subtract the new number by the original number
778 - 978 = -200
-200 ÷ 978 = -0.20449897750511248
-0.20449897750511248 x 100 = -20.45%