-17.18% is the change from 978 to 810
Calculation steps:
[( 810 - 978 ) ÷ 978] x 100 = -17.18%
Formula
Percentage change = [(810 - 978) / 978] x 100
Subtract the new number by the original number
810 - 978 = -168
-168 ÷ 978 = -0.17177914110429449
-0.17177914110429449 x 100 = -17.18%