289.84% is the change from 256 to 998
Calculation steps:
[( 998 - 256 ) ÷ 256] x 100 = 289.84%
Formula
Percentage change = [(998 - 256) / 256] x 100
Subtract the new number by the original number
998 - 256 = 742
742 ÷ 256 = 2.8984375
2.8984375 x 100 = 289.84%