283.2% is the change from 256 to 981
Calculation steps:
[( 981 - 256 ) ÷ 256] x 100 = 283.2%
Formula
Percentage change = [(981 - 256) / 256] x 100
Subtract the new number by the original number
981 - 256 = 725
725 ÷ 256 = 2.83203125
2.83203125 x 100 = 283.2%