-74.54% is the change from 978 to 249
Calculation steps:
[( 249 - 978 ) ÷ 978] x 100 = -74.54%
Formula
Percentage change = [(249 - 978) / 978] x 100
Subtract the new number by the original number
249 - 978 = -729
-729 ÷ 978 = -0.745398773006135
-0.745398773006135 x 100 = -74.54%