-18.2% is the change from 978 to 800
Calculation steps:
[( 800 - 978 ) ÷ 978] x 100 = -18.2%
Formula
Percentage change = [(800 - 978) / 978] x 100
Subtract the new number by the original number
800 - 978 = -178
-178 ÷ 978 = -0.18200408997955012
-0.18200408997955012 x 100 = -18.2%