-17.48% is the change from 978 to 807
Calculation steps:
[( 807 - 978 ) ÷ 978] x 100 = -17.48%
Formula
Percentage change = [(807 - 978) / 978] x 100
Subtract the new number by the original number
807 - 978 = -171
-171 ÷ 978 = -0.17484662576687116
-0.17484662576687116 x 100 = -17.48%