-73.93% is the change from 978 to 255
Calculation steps:
[( 255 - 978 ) ÷ 978] x 100 = -73.93%
Formula
Percentage change = [(255 - 978) / 978] x 100
Subtract the new number by the original number
255 - 978 = -723
-723 ÷ 978 = -0.7392638036809815
-0.7392638036809815 x 100 = -73.93%