-18.51% is the change from 978 to 797
Calculation steps:
[( 797 - 978 ) ÷ 978] x 100 = -18.51%
Formula
Percentage change = [(797 - 978) / 978] x 100
Subtract the new number by the original number
797 - 978 = -181
-181 ÷ 978 = -0.18507157464212678
-0.18507157464212678 x 100 = -18.51%