274.61% is the change from 256 to 959
Calculation steps:
[( 959 - 256 ) ÷ 256] x 100 = 274.61%
Formula
Percentage change = [(959 - 256) / 256] x 100
Subtract the new number by the original number
959 - 256 = 703
703 ÷ 256 = 2.74609375
2.74609375 x 100 = 274.61%