-9.2% is the change from 978 to 888
Calculation steps:
[( 888 - 978 ) ÷ 978] x 100 = -9.2%
Formula
Percentage change = [(888 - 978) / 978] x 100
Subtract the new number by the original number
888 - 978 = -90
-90 ÷ 978 = -0.09202453987730061
-0.09202453987730061 x 100 = -9.2%