282.03% is the change from 256 to 978
Calculation steps:
[( 978 - 256 ) ÷ 256] x 100 = 282.03%
Formula
Percentage change = [(978 - 256) / 256] x 100
Subtract the new number by the original number
978 - 256 = 722
722 ÷ 256 = 2.8203125
2.8203125 x 100 = 282.03%