275% is the change from 256 to 960
Calculation steps:
[( 960 - 256 ) ÷ 256] x 100 = 275%
Formula
Percentage change = [(960 - 256) / 256] x 100
Subtract the new number by the original number
960 - 256 = 704
704 ÷ 256 = 2.75
2.75 x 100 = 275%
Example