-17.28% is the change from 978 to 809
Calculation steps:
[( 809 - 978 ) ÷ 978] x 100 = -17.28%
Formula
Percentage change = [(809 - 978) / 978] x 100
Subtract the new number by the original number
809 - 978 = -169
-169 ÷ 978 = -0.17280163599182005
-0.17280163599182005 x 100 = -17.28%