288.28% is the change from 256 to 994
Calculation steps:
[( 994 - 256 ) ÷ 256] x 100 = 288.28%
Formula
Percentage change = [(994 - 256) / 256] x 100
Subtract the new number by the original number
994 - 256 = 738
738 ÷ 256 = 2.8828125
2.8828125 x 100 = 288.28%