283.53% is the change from 255 to 978
Calculation steps:
[( 978 - 255 ) ÷ 255] x 100 = 283.53%
Formula
Percentage change = [(978 - 255) / 255] x 100
Subtract the new number by the original number
978 - 255 = 723
723 ÷ 255 = 2.835294117647059
2.835294117647059 x 100 = 283.53%